I give 5 stars for comfort but 1 star for coolness. It does have an odor upon opening, but goes away rather quickly. It would be a perfect topper if only it was cool.

I have yet to sleep on this so I can't review it for comfort. I bought this in store and when I unrolled it, it smells so terribly like fish, I don't know when I'll be able to sleep on it.

[This review was collected as part of a promotion.] First and foremost, the cooling feature that the product boasts is simply ineffective. Despite the claims of temperature regulation and a cool night's sleep, I found myself waking up drenched in sweat throughout the night. The gel-infused memory foam failed to provide the promised cooling effect, leaving me tossing and turning in discomfort. Furthermore, the mattress topper did little to alleviate the pressure points and provide adequate support. I had hoped that the 3" thickness would provide a significant improvement to my mattress's comfort, but I was sorely mistaken. The foam quickly lost its shape and failed to provide the necessary support for my body, leaving me with aches and pains in the morning. Another major issue I encountered was the strong chemical odor emitted by the topper upon unpacking. The off-putting smell persisted for several days, even after leaving it to air out. It was extremely unpleasant and disrupted my sleep, defeating the purpose of investing in a mattress topper in the first place. Additionally, the durability of this product is questionable. After only a few weeks of use, I noticed significant wear and tear on the topper. The foam started developing visible indentations and began to lose its shape, compromising its ability to provide the desired comfort and support. Overall, I cannot recommend the Serta 3" Cool Nights Gel Memory Foam Mattress Topper. It failed to deliver on its promises of cooling, support, durability, and value for money. Save yourself the disappointment and look elsewhere for a better mattress topper option.

[This review was collected as part of a promotion.] I have been using the cool night topper for the last week. I instantly saw a difference from my old one. I usually get pretty hot throughout the night, but with the Serta cool topper, I was blown away by how cool it kept me. The topper's memory foam feel was great for my back. I work on a computer for about 8 hours a day and this topper has definitely helped with my back pain when I get a full night's rest. When I upgrade to a king I will be buying this topper again.

[This review was collected as part of a promotion.] I love this Serta cool nights topper it’s easy to set up and is so comfortable keeps me cool at night and also holds heat well the cover it comes with is very nice too I highly suggest picking one up the price and quality is amazing for what you get

[This review was collected as part of a promotion.] My husband bought a mattress for our guest room but he insisted on getting a firm one for his mother. Unfortunately he didn’t get firm, he got hard as a brick. This mattress topper is the perfect combination of softness and coolness!

[This review was collected as part of a promotion.] The bed topper is a excellent add to my bed. Its nice and cool on those night sweat nights. I love the feel of extra layer of softness. Your body doesn't sink down in a hole like some toppers I have tried. Holds its shape. I love it came with its own cover too! Easy to remove and wash when needed.

[This review was collected as part of a promotion.] This mattress topper has completely restored my mattress to a level of comfort that it didn't even have when it was brand new,which I didn't even know was possible. The topper is made of memory gel foam that has a special cooling technology that keeps the space around you cooler when sleeping. I am a restless sleeper that tosses and turns all night long and I am one of those people that's always hot and uncomfortable while sleeping,which is why I wanted to try this specific topper. I definitely thought that this would make my bed much more comfortable as this is a brand that I trust and memory gel foam is great, however, I was a bit skeptical about the cooling effect abilities but figured I had nothing to lose. I am so happy that I gave this topper a chance as it really does keep me cooler while sleeping ,which makes a huge difference in the quality of my sleep.The support is unbelievable,as it literally hits my body at all the right spots like it was customly created just for me. The other part of this topper that I love is that it doesn't transfer movement,so when my spouse moves or gets out of bed I no longer feel movement on my side,which as a light sleeper this is a huge deal. Overall,this is an amazing product that I would highly recommend to everyone, including my family and friends,as the only regret that I have is not getting one of these sooner.

[This review was collected as part of a promotion.] The Serta Cool Nights Topper has been a welcome addition to my son's bed. It's light weight, breathable and stays put. My 11-year old is a warm Sleeper. He has trouble getting comfortable or sleeping unless the room is cool. This topper has made it a snap for my son to fall asleep and to stay asleep.

[This review was collected as part of a promotion.] wow, this is perfect for travel. I already own a lot of great beds at the house but I have this as part of my travel kit. We do a lot of Airbnb's and other rentals through out the year and this rolls up to and is pretty compact for our road trips. This make sleeping on any beds a 10 out of 10. I highly reccomend this to anyone trying to upgrade an older or uncomforatble bed.