Zinus Green Tea Cooling Gel Memory Foam Mattress Conventional Bed Mattress, High Density Polyester Memory Foam, White Orchid, Full

Key Features

• AS COOL AS POSSIBLE - Settle into a bed made with our most refreshing formula yet, promising perfectly temperature-regulated sleep and a clean feeling night after night, all thanks to our wraparound memory foam filled with cooling gel and green tea
• PRESSURE RELIEVING FOAMS - Layers of ultra-cooling gel and green tea-infused memory foam, soft and comfortable foam and high-density durable base foam
• US CERTIFICATION - The highest quality foam is CertiPUR US certified for durability, performance and content
• PACKAGED WITH CARE - Our technology allows this mattress to be effectively compressed into a box that is easily shipped and maneuvered in the bedroom; simply unpack, unroll and this mattress does the rest, expanding to its original shape in 72 hours
• 10 year limited warranty included; Twin mattress supports a maximum weight of 250 lbs, while all other sizes can hold up to 500 lbs

About This Product

This cooling gel-infused memory foam mattress is specially designed to help regulate your body temperature throughout the night, making it a great solution for hot sleepers. Layers of soft and supportive foam mold to your body to relieve sore muscles and achy joints as you snooze. All high-quality foam in this mattress is CertiPUR-US® certified to ensure there are no harmful chemicals where you rest—giving you peace of mind you can sleep on.

Product Details

Brand

Zinus

Model

ZU-MFGN1YZI-10F

Color

White Orchid

Size

Double

Dimensions

190.5 x 137.2 x 25.4 centimetres

Weight

20.16 kg

Material

Memory Foam High-Density Foam Polyester Gel Foam

Manufacturer

Zinus

Warranty

Top reviews from other countries li.review { margin-bottom: 22px; } li.review:last-child { margin-bottom: 0; } if(window.ue) { ue.count("DesktopCredibleBadgesInTopReviewsDetailPageCount", 0) } <img src="https://m.media-amazon.com/images/S/amazon-avatars-global/default.png"/>CentrifugalFarce5.0 out of 5 stars Well worth the effort... AWESOME CUSTOMER SERVICE Reviewed in the United States on 3 December 2024Colour Name: WhiteSize Name: QueenVerified Purchase (function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } Let me start off by saying that it has been a rollercoaster ride with this mattress. Okay, so why the 5 stars, you ask? Well, I will tell you why.When it arrived, everything was great. It was packaged well. Vacuumed sealed so tight I didn't think it would ever unroll right. I gave it the full 72 hours to inflate. That's when the problems occurred.At 75 hours, the mattress had barely inflated to 8 inches. For reference, I bought the 10-inch. And I know sometimes that the measurements can be a bit off, so I considered it my fault for being such a cheap arse and not forking out for the 12 or 14. My reasoning: I was gonna get a topper at some point and I don't want to be like Princess and tf-ng Pea in a room with a low ceiling.I waited another day. Measured again. No sign of movement. I tried to contact the seller and, well anyone who has tried doing anything on Amazon knows how wonderful that is. Instead of giving me the seller, it sent me ring around the rosy with processing a return. I cannot tell you how many times I made it clear that I did NOT want to send it back and I did NOT want a refund. I only wanted help in trying to resolve this issue myself. I felt it was something that could be fixed. If it came to it, then we could talk about credits or refunds.This went on for over an hour. I finally managed somehow to be taken to the manufacturer's website and, once again went through the drama of "No, I don't want to return it and I don't want a refund. I just want help." I finally reached a human being at some point. A person by the name of Maverick contacted me and suggested I set the mattress on the floor and roll around or walk on it a bit. Apparently, sometimes the memory foam doesn't want to decompress all the way. These actions tend to help.I wrote back to him every time there was movement. 9 inches. 9.5 inches. I was so excited the day after my roommate slept on it that it got all the way up to 10 inches inflated! I immediately fired off a note to Maverick to let him know and to thank him for the suggestions.He was patient and told me exactly what needed to be done and why. It never even occurred to me that sometimes memory foam just "be that way" and you have to sort of give it a boost.All that said, I've been sleeping on it now for about a month. It's probably the most firm memory foam I've ever owned, and I probably could have done well with one a bit squishier, but this is fine. I got exactly what I ordered. I'm not gonna complain about that.I don't see any evidence of fiberglass, as mentioned in another review. Of course, I don't ever intent to remove the protective cover and will instead have one on top of it at some point.It being several inches more shallow than other mattresses I've owned, let me just tell you know... it puts them to shame! My previous mattress, same brand, was a 12-inch and not nearly as firm. It had edge issues where you'd fall to the floor if you weren't careful. I don't see that being an issue with this one. It's fairly sturdy sitting on the edge and I imagine that if I had access to the corners they would be the same #sleighbed. And my previous mattress, you could feel the metal slats underneath every freaking time you turned. It was awful. I had to put sheets of plywood down to keep from being gored in the night. With this mattress though?? I don't feel a dang thing. Granted the slats on this bed are wooden and not metal, even when I pounce on the bed, I don't feel a thing - just snuggliness.I'm waiting for my bed to break if I do that again though - for reference, I'm about 345lbs. Do you have any idea what that does to a bed if you just pounce on it like a lion on the Serengeti? Apparently, nothing (knock on wood). The mattress absorbs the impact. I would be confident with dropping an egg from a skyscraper onto this mattress. That is how awesome it is.It didn't have any sort of weird odor when I removed it from its wrapping. The only thing that sort of made it difficult to get any help was that the date of manufacture was missing from the tag when I was trying to get assistance from the manufacturer. If anyone has to deal with that, just take a picture of the tag anyway to prove that it is blank. It'll help you out in the long run.If I'm ever in the market for a mattress again any time soon, I am definitely purchasing this one - as long as it's available. I can sleep at night. It doesn't aggravate my low back pain or even my hip pain. I'm actually grateful it isn't as squishy as I would like because then my problem would be never wanting to get out of bed. Heck, even with my weight (when lying down) I barely sink into the mattress. And at least now I can wake up in the morning and go about my day without feeling as though my body has been hit by a truck and all I want to do is stay in bed. Very happy with this purchase! Read more Report if(window.ue) { ue.count("DesktopCredibleBadgesInTopReviewsDetailPageCount", 0) } <img src="https://m.media-amazon.com/images/S/amazon-avatars-global/default.png"/>Kyle M5.0 out of 5 stars I love, love, love this mattress! Perfect comfort, support, and cool sleep. Reviewed in Canada on 28 August 2025Colour Name: White OrchidSize Name: DoubleVerified Purchase I absolutely love this Zinus Full 10-inch Green Tea Cooling Gel Memory Foam Mattress! From the moment I laid down on it, I knew it was going to be a game-changer for my sleep. It strikes the perfect balance between comfort and support, cradling my body while keeping my spine properly aligned.Comfort & Pressure ReliefThe memory foam adapts perfectly to my body, relieving pressure points on my back, shoulders, and hips. The cooling gel layer keeps the mattress comfortable and prevents overheating, making it perfect for a cool, restful sleep. I wake up feeling fully refreshed with far less stiffness than I used to experience on my old mattress.Green Tea Infusion & FreshnessThe green tea infusion is a thoughtful touch—it helps keep the mattress smelling fresh and odor-free, which makes the unboxing and first nights a much more pleasant experience.Quality & CertificationThis mattress is CertiPUR-US certified, so I feel confident knowing the foam meets strict standards for content, emissions, and durability. It’s a well-constructed mattress that has held its shape perfectly over weeks of use, with no sagging or uneven wear.ConvenienceIt comes compressed in a box, making setup easy and hassle-free. Unboxing and allowing it to expand was simple, and it reached full size quickly.& Peace of MindThe 10-year warranty gives extra reassurance that this is a mattress built to last. I feel confident in my investment knowing Zinus stands behind their product.Final ThoughtsOverall, this mattress is comfortable, supportive, and keeps me cool throughout the night. The combination of green tea infusion, cooling gel, and pressure-relieving memory foam makes it an excellent choice for anyone looking for a restful, rejuvenating sleep. Read more Report if(window.ue) { ue.count("DesktopCredibleBadgesInTopReviewsDetailPageCount", 0) } <img src="https://m.media-amazon.com/images/S/amazon-avatars-global/default.png"/>Sunshine5.0 out of 5 stars Great mattress for the money. Reviewed in the United States on 17 March 2026Colour Name: White OrchidSize Name: DoubleVerified Purchase Bought this for my guest room. The mattress had no smell, fluffed up to the full 10 inches and my guests report the mattress is very comfortable. I ordered a full size, it fits on the frame perfectly. We got it on a great sale and the value is excellent. I feel like this is a good quality mattress and supports body weight well and evenly. Recommend. Read more Report if(window.ue) { ue.count("DesktopCredibleBadgesInTopReviewsDetailPageCount", 0) } <img src="https://m.media-amazon.com/images/S/amazon-avatars-global/6f0ce71b-20ce-44d0-a1cc-13084083f402._CR0%2C0%2C500%2C500_SX460_.jpg"/>Whalebait 4.0 out of 5 stars Nice firm mattress Reviewed in Canada on 22 February 2026Colour Name: White OrchidSize Name: DoubleVerified Purchase Nice mattress, it came quickly and in an easy to transport box. The mattress took about 36 hours to fully inflate back to size. There was no odour (I read that there might be), but it was not notable. It’s comfortable, but it is definitely a firmer mattress. Read more Report if(window.ue) { ue.count("DesktopCredibleBadgesInTopReviewsDetailPageCount", 0) } <img src="https://m.media-amazon.com/images/S/amazon-avatars-global/default.png"/>Emmaley Ray5.0 out of 5 stars BEST AMAZON PURCHASE SO FAR 👌!! Reviewed in the United States on 25 April 2026Colour Name: WhiteSize Name: QueenVerified Purchase BEST AMAZON PURCHASE YET 👌.2 months in now AND...No more hip pain!!We both sleep much deeper. We wake up with no more aches. We have more energy!Key 🔑 points-The box arrived on time.It was heavy. ( We are in our 30s and I recommend 2 people for un-boxing)We gave it 24 hours to air out.We noticed no off fume smell!Does not sleep HOT.Does not sleep ice COLD.Breaths well, depending on the sheets.We found that it breathes best with cotton sheets.We didn't need shakes and supplements. We needed a new mattress 😆 🤣!! Read more Report See more reviews Top reviews from other countries li.review { margin-bottom: 22px; } li.review:last-child { margin-bottom: 0; } if(window.ue) { ue.count("DesktopCredibleBadgesInTopReviewsDetailPageCount", 0) } <img src="https://m.media-amazon.com/images/S/amazon-avatars-global/default.png"/>CentrifugalFarce5.0 out of 5 stars Well worth the effort... AWESOME CUSTOMER SERVICE Reviewed in the United States on 3 December 2024Colour Name: WhiteSize Name: QueenVerified Purchase (function() { P.when('cr-A', 'ready').execute(function(A) { if(typeof A.toggleExpanderAriaLabel === 'function') { A.toggleExpanderAriaLabel('review_text_read_more', 'Read more of this review', 'Read less of this review'); } }); })(); .review-text-read-more-expander:focus-visible { outline: 2px solid #2162a1; outline-offset: 2px; border-radius: 5px; } Let me start off by saying that it has been a rollercoaster ride with this mattress. Okay, so why the 5 stars, you ask? Well, I will tell you why.When it arrived, everything was great. It was packaged well. Vacuumed sealed so tight I didn't think it would ever unroll right. I gave it the full 72 hours to inflate. That's when the problems occurred.At 75 hours, the mattress had barely inflated to 8 inches. For reference, I bought the 10-inch. And I know sometimes that the measurements can be a bit off, so I considered it my fault for being such a cheap arse and not forking out for the 12 or 14. My reasoning: I was gonna get a topper at some point and I don't want to be like Princess and tf-ng Pea in a room with a low ceiling.I waited another day. Measured again. No sign of movement. I tried to contact the seller and, well anyone who has tried doing anything on Amazon knows how wonderful that is. Instead of giving me the seller, it sent me ring around the rosy with processing a return. I cannot tell you how many times I made it clear that I did NOT want to send it back and I did NOT want a refund. I only wanted help in trying to resolve this issue myself. I felt it was something that could be fixed. If it came to it, then we could talk about credits or refunds.This went on for over an hour. I finally managed somehow to be taken to the manufacturer's website and, once again went through the drama of "No, I don't want to return it and I don't want a refund. I just want help." I finally reached a human being at some point. A person by the name of Maverick contacted me and suggested I set the mattress on the floor and roll around or walk on it a bit. Apparently, sometimes the memory foam doesn't want to decompress all the way. These actions tend to help.I wrote back to him every time there was movement. 9 inches. 9.5 inches. I was so excited the day after my roommate slept on it that it got all the way up to 10 inches inflated! I immediately fired off a note to Maverick to let him know and to thank him for the suggestions.He was patient and told me exactly what needed to be done and why. It never even occurred to me that sometimes memory foam just "be that way" and you have to sort of give it a boost.All that said, I've been sleeping on it now for about a month. It's probably the most firm memory foam I've ever owned, and I probably could have done well with one a bit squishier, but this is fine. I got exactly what I ordered. I'm not gonna complain about that.I don't see any evidence of fiberglass, as mentioned in another review. Of course, I don't ever intent to remove the protective cover and will instead have one on top of it at some point.It being several inches more shallow than other mattresses I've owned, let me just tell you know... it puts them to shame! My previous mattress, same brand, was a 12-inch and not nearly as firm. It had edge issues where you'd fall to the floor if you weren't careful. I don't see that being an issue with this one. It's fairly sturdy sitting on the edge and I imagine that if I had access to the corners they would be the same #sleighbed. And my previous mattress, you could feel the metal slats underneath every freaking time you turned. It was awful. I had to put sheets of plywood down to keep from being gored in the night. With this mattress though?? I don't feel a dang thing. Granted the slats on this bed are wooden and not metal, even when I pounce on the bed, I don't feel a thing - just snuggliness.I'm waiting for my bed to break if I do that again though - for reference, I'm about 345lbs. Do you have any idea what that does to a bed if you just pounce on it like a lion on the Serengeti? Apparently, nothing (knock on wood). The mattress absorbs the impact. I would be confident with dropping an egg from a skyscraper onto this mattress. That is how awesome it is.It didn't have any sort of weird odor when I removed it from its wrapping. The only thing that sort of made it difficult to get any help was that the date of manufacture was missing from the tag when I was trying to get assistance from the manufacturer. If anyone has to deal with that, just take a picture of the tag anyway to prove that it is blank. It'll help you out in the long run.If I'm ever in the market for a mattress again any time soon, I am definitely purchasing this one - as long as it's available. I can sleep at night. It doesn't aggravate my low back pain or even my hip pain. I'm actually grateful it isn't as squishy as I would like because then my problem would be never wanting to get out of bed. Heck, even with my weight (when lying down) I barely sink into the mattress. And at least now I can wake up in the morning and go about my day without feeling as though my body has been hit by a truck and all I want to do is stay in bed. Very happy with this purchase! Read more Report if(window.ue) { ue.count("DesktopCredibleBadgesInTopReviewsDetailPageCount", 0) } <img src="https://m.media-amazon.com/images/S/amazon-avatars-global/default.png"/>Kyle M5.0 out of 5 stars I love, love, love this mattress! Perfect comfort, support, and cool sleep. Reviewed in Canada on 28 August 2025Colour Name: White OrchidSize Name: DoubleVerified Purchase I absolutely love this Zinus Full 10-inch Green Tea Cooling Gel Memory Foam Mattress! From the moment I laid down on it, I knew it was going to be a game-changer for my sleep. It strikes the perfect balance between comfort and support, cradling my body while keeping my spine properly aligned.Comfort & Pressure ReliefThe memory foam adapts perfectly to my body, relieving pressure points on my back, shoulders, and hips. The cooling gel layer keeps the mattress comfortable and prevents overheating, making it perfect for a cool, restful sleep. I wake up feeling fully refreshed with far less stiffness than I used to experience on my old mattress.Green Tea Infusion & FreshnessThe green tea infusion is a thoughtful touch—it helps keep the mattress smelling fresh and odor-free, which makes the unboxing and first nights a much more pleasant experience.Quality & CertificationThis mattress is CertiPUR-US certified, so I feel confident knowing the foam meets strict standards for content, emissions, and durability. It’s a well-constructed mattress that has held its shape perfectly over weeks of use, with no sagging or uneven wear.ConvenienceIt comes compressed in a box, making setup easy and hassle-free. Unboxing and allowing it to expand was simple, and it reached full size quickly.Warranty & Peace of MindThe 10-year warranty gives extra reassurance that this is a mattress built to last. I feel confident in my investment knowing Zinus stands behind their product.Final ThoughtsOverall, this mattress is comfortable, supportive, and keeps me cool throughout the night. The combination of green tea infusion, cooling gel, and pressure-relieving memory foam makes it an excellent choice for anyone looking for a restful, rejuvenating sleep. Read more Report if(window.ue) { ue.count("DesktopCredibleBadgesInTopReviewsDetailPageCount", 0) } <img src="https://m.media-amazon.com/images/S/amazon-avatars-global/default.png"/>Sunshine5.0 out of 5 stars Great mattress for the money. Reviewed in the United States on 17 March 2026Colour Name: White OrchidSize Name: DoubleVerified Purchase Bought this for my guest room. The mattress had no smell, fluffed up to the full 10 inches and my guests report the mattress is very comfortable. I ordered a full size, it fits on the frame perfectly. We got it on a great sale and the value is excellent. I feel like this is a good quality mattress and supports body weight well and evenly. Recommend. Read more Report if(window.ue) { ue.count("DesktopCredibleBadgesInTopReviewsDetailPageCount", 0) } <img src="https://m.media-amazon.com/images/S/amazon-avatars-global/6f0ce71b-20ce-44d0-a1cc-13084083f402._CR0%2C0%2C500%2C500_SX460_.jpg"/>Whalebait 4.0 out of 5 stars Nice firm mattress Reviewed in Canada on 22 February 2026Colour Name: White OrchidSize Name: DoubleVerified Purchase Nice mattress, it came quickly and in an easy to transport box. The mattress took about 36 hours to fully inflate back to size. There was no odour (I read that there might be), but it was not notable. It’s comfortable, but it is definitely a firmer mattress. Read more Report if(window.ue) { ue.count("DesktopCredibleBadgesInTopReviewsDetailPageCount", 0) } <img src="https://m.media-amazon.com/images/S/amazon-avatars-global/default.png"/>Emmaley Ray5.0 out of 5 stars BEST AMAZON PURCHASE SO FAR 👌!! Reviewed in the United States on 25 April 2026Colour Name: WhiteSize Name: QueenVerified Purchase BEST AMAZON PURCHASE YET 👌.2 months in now AND...No more hip pain!!We both sleep much deeper. We wake up with no more aches. We have more energy!Key 🔑 points-The box arrived on time.It was heavy. ( We are in our 30s and I recommend 2 people for un-boxing)We gave it 24 hours to air out.We noticed no off fume smell!Does not sleep HOT.Does not sleep ice COLD.Breaths well, depending on the sheets.We found that it breathes best with cotton sheets.We didn't need shakes and supplements. We needed a new mattress 😆 🤣!! Read more Report See more reviews if(window.ue) { ue.count("DesktopCredibleBadgesInTopReviewsDetailPageCount", 0) } <img src="https://m.media-amazon.com/images/S/amazon-avatars-global/default.png"/>Kyle M5.0 out of 5 stars I love, love, love this mattress! Perfect comfort, support, and cool sleep. Reviewed in Canada on 28 August 2025Colour Name: White OrchidSize Name: DoubleVerified Purchase I absolutely love this Zinus Full 10-inch Green Tea Cooling Gel Memory Foam Mattress! From the moment I laid down on it, I knew it was going to be a game-changer for my sleep. It strikes the perfect balance between comfort and support, cradling my body while keeping my spine properly aligned.Comfort & Pressure ReliefThe memory foam adapts perfectly to my body, relieving pressure points on my back, shoulders, and hips. The cooling gel layer keeps the mattress comfortable and prevents overheating, making it perfect for a cool, restful sleep. I wake up feeling fully refreshed with far less stiffness than I used to experience on my old mattress.Green Tea Infusion & FreshnessThe green tea infusion is a thoughtful touch—it helps keep the mattress smelling fresh and odor-free, which makes the unboxing and first nights a much more pleasant experience.Quality & CertificationThis mattress is CertiPUR-US certified, so I feel confident knowing the foam meets strict standards for content, emissions, and durability. It’s a well-constructed mattress that has held its shape perfectly over weeks of use, with no sagging or uneven wear.ConvenienceIt comes compressed in a box, making setup easy and hassle-free. Unboxing and allowing it to expand was simple, and it reached full size quickly.Warranty & Peace of MindThe 10-year warranty gives extra reassurance that this is a mattress built to last. I feel confident in my investment knowing Zinus stands behind their product.Final ThoughtsOverall, this mattress is comfortable, supportive, and keeps me cool throughout the night. The combination of green tea infusion, cooling gel, and pressure-relieving memory foam makes it an excellent choice for anyone looking for a restful, rejuvenating sleep. Read more Report I absolutely love this Zinus Full 10-inch Green Tea Cooling Gel Memory Foam Mattress! From the moment I laid down on it, I knew it was going to be a game-changer for my sleep. It strikes the perfect balance between comfort and support, cradling my body while keeping my spine properly aligned.Comfort & Pressure ReliefThe memory foam adapts perfectly to my body, relieving pressure points on my back, shoulders, and hips. The cooling gel layer keeps the mattress comfortable and prevents overheating, making it perfect for a cool, restful sleep. I wake up feeling fully refreshed with far less stiffness than I used to experience on my old mattress.Green Tea Infusion & FreshnessThe green tea infusion is a thoughtful touch—it helps keep the mattress smelling fresh and odor-free, which makes the unboxing and first nights a much more pleasant experience.Quality & CertificationThis mattress is CertiPUR-US certified, so I feel confident knowing the foam meets strict standards for content, emissions, and durability. It’s a well-constructed mattress that has held its shape perfectly over weeks of use, with no sagging or uneven wear.ConvenienceIt comes compressed in a box, making setup easy and hassle-free. Unboxing and allowing it to expand was simple, and it reached full size quickly.Warranty & Peace of MindThe 10-year warranty gives extra reassurance that this is a mattress built to last. I feel confident in my investment knowing Zinus stands behind their product.Final ThoughtsOverall, this mattress is comfortable, supportive, and keeps me cool throughout the night. The combination of green tea infusion, cooling gel, and pressure-relieving memory foam makes it an excellent choice for anyone looking for a restful, rejuvenating sleep. Read more I absolutely love this Zinus Full 10-inch Green Tea Cooling Gel Memory Foam Mattress! From the moment I laid down on it, I knew it was going to be a game-changer for my sleep. It strikes the perfect balance between comfort and support, cradling my body while keeping my spine properly aligned.Comfort & Pressure ReliefThe memory foam adapts perfectly to my body, relieving pressure points on my back, shoulders, and hips. The cooling gel layer keeps the mattress comfortable and prevents overheating, making it perfect for a cool, restful sleep. I wake up feeling fully refreshed with far less stiffness than I used to experience on my old mattress.Green Tea Infusion & FreshnessThe green tea infusion is a thoughtful touch—it helps keep the mattress smelling fresh and odor-free, which makes the unboxing and first nights a much more pleasant experience.Quality & CertificationThis mattress is CertiPUR-US certified, so I feel confident knowing the foam meets strict standards for content, emissions, and durability. It’s a well-constructed mattress that has held its shape perfectly over weeks of use, with no sagging or uneven wear.ConvenienceIt comes compressed in a box, making setup easy and hassle-free. Unboxing and allowing it to expand was simple, and it reached full size quickly.Warranty & Peace of MindThe 10-year warranty gives extra reassurance that this is a mattress built to last. I feel confident in my investment knowing Zinus stands behind their product.Final ThoughtsOverall, this mattress is comfortable, supportive, and keeps me cool throughout the night. The combination of green tea infusion, cooling gel, and pressure-relieving memory foam makes it an excellent choice for anyone looking for a restful, rejuvenating sleep.

ASIN

B0CKYYYYYF

Customer Reviews Summary

Let me start off by saying that it has been a rollercoaster ride with this mattress. Okay, so why the 5 stars, you ask? Well, I will tell you why.When it arrived, everything was great. It was packaged well. Vacuumed sealed so tight I didn't think it would ever unroll right. I gave it the full 72 hours to inflate. That's when the problems occurred.At 75 hours, the mattress had barely inflated to 8 inches. For reference, I bought the 10-inch. And I know sometimes that the measurements can be a bit off, so I considered it my fault for being such a cheap arse and not forking out for the 12 or 14. My reasoning: I was gonna get a topper at some point and I don't want to be like Princess and tf-ng Pea in a room with a low ceiling.I waited another day. Measured again. No sign of movement. I tried to contact the seller and, well anyone who has tried doing anything on Amazon knows how wonderful that is. Instead of giving me the seller, it sent me ring around the rosy with processing a return. I cannot tell you how many times I made it clear that I did NOT want to send it back and I did NOT want a refund. I only wanted help in trying to resolve this issue myself. I felt it was something that could be fixed. If it came to it, then we could talk about credits or refunds.This went on for over an hour. I finally managed somehow to be taken to the manufacturer's website and, once again went through the drama of "No, I don't want to return it and I don't want a refund. I just want help." I finally reached a human being at some point. A person by the name of Maverick contacted me and suggested I set the mattress on the floor and roll around or walk on it a bit. Apparently, sometimes the memory foam doesn't want to decompress all the way. These actions tend to help.I wrote back to him every time there was movement. 9 inches. 9.5 inches. I was so excited the day after my roommate slept on it that it got all the way up to 10 inches inflated! I immediately fired off a note to Maverick to let him know and to thank him for the suggestions.He was patient and told me exactly what needed to be done and why. It never even occurred to me that sometimes memory foam just "be that way" and you have to sort of give it a boost.All that said, I've been sleeping on it now for about a month. It's probably the most firm memory foam I've ever owned, and I probably could have done well with one a bit squishier, but this is fine. I got exactly what I ordered. I'm not gonna complain about that.I don't see any evidence of fiberglass, as mentioned in another review. Of course, I don't ever intent to remove the protective cover and will instead have one on top of it at some point.It being several inches more shallow than other mattresses I've owned, let me just tell you know... it puts them to shame! My previous mattress, same brand, was a 12-inch and not nearly as firm. It had edge issues where you'd fall to the floor if you weren't careful. I don't see that being an issue with this one. It's fairly sturdy sitting on the edge and I imagine that if I had access to the corners they would be the same #sleighbed. And my previous mattress, you could feel the metal slats underneath every freaking time you turned. It was awful. I had to put sheets of plywood down to keep from being gored in the night. With this mattress though?? I don't feel a dang thing. Granted the slats on this bed are wooden and not metal, even when I pounce on the bed, I don't feel a thing - just snuggliness.I'm waiting for my bed to break if I do that again though - for reference, I'm about 345lbs. Do you have any idea what that does to a bed if you just pounce on it like a lion on the Serengeti? Apparently, nothing (knock on wood). The mattress absorbs the impact. I would be confident with dropping an egg from a skyscraper onto this mattress. That is how awesome it is.It didn't have any sort of weird odor when I removed it from its wrapping. The only thing that sort of made it difficult to get any help was that the date of manufacture was missing from the tag when I was trying to get assistance from the manufacturer. If anyone has to deal with that, just take a picture of the tag anyway to prove that it is blank. It'll help you out in the long run.If I'm ever in the market for a mattress again any time soon, I am definitely purchasing this one - as long as it's available. I can sleep at night. It doesn't aggravate my low back pain or even my hip pain. I'm actually grateful it isn't as squishy as I would like because then my problem would be never wanting to get out of bed. Heck, even with my weight (when lying down) I barely sink into the mattress. And at least now I can wake up in the morning and go about my day without feeling as though my body has been hit by a truck and all I want to do is stay in bed. Very happy with this purchase!