Literally feels like you're sleeping on a cloud. 4 inches of down alternative. So absolutely wonderfully comfortable. Since purchasing my new mattress, I've woken up with back pain every morning and this morning was the first time in months that I woke up pain free. Absolute must buy! Great price for a wonderful product!!! Highly recommended. Deep pockets so it will fit almost any mattress.Just received mine a few days ago. as soon as I opened the packages, I washed and dried it. Once dried I went to lay out over my bed and ALREADY there was a huge yellowish stain on the side of the topper. It literally went from box to washing machine so there’s NO WAY that came from me. Decided to keep it and order a new one from another company but sheesh, that sucked.Update: THIS COMPANY REACHED OUT TO ME AND GAVE ME A FULL REFUND! The customer service is beyond perfect ! I still have the topper for my sons playpen but the fact they cared enough to rectify the situation is just great. It’s hard to find good quality customer care, and this company definitely knows how to make it right. The mattress is thicker than another brand I’ve purchased which is why I feel comfortable putting it in my sons playpen to protect him from my hardwood floors!It worked to create just enough softness on my new form mattress. I originally bought a gel foam topper but my husband don’t like the sinking in feeling. I was nervous based on some of the negative reviews it would be too thin but it’s just rightI run a real Bed and Breakfast. I wanted a more luxury feel on my mattresses. I ordered one as a test. It passed! Ordered two more. The guests always me tell that they slept "so well." I will definitely buy again.It was a gift for my sister and she loved it!! she always talks about how incredibly comfortable and cozy it is, I highly recommend it.This is not a paid ad! WE LOVE THIS MATTRESS COVER!!! it is exactly what we’ve been wanting for years. I don’t know why it took us this long to buy one. Our medium firm Sealy mattress was already comfy as is, but this just makes it feel like I’m sleeping on a cloud. Heavenly!! Highly recommend!!I have bought many toppers in the past year and they ended up smashing flat in a week or two or turned lumpy after washing. I took a chance on this one and OMGOSH so glad I did. I've had bad back problems and several surgeries that started at a young age. Getting comfy has been so hard. I've been diagnosed with Adhesive Arachnoiditis, a rare disease, that causes inflammation an tumors in my spinal canal. Second most painful disease with bone cancer being the first. Lying down is the least painful so I'm in my bed A LOT. My mattress has to be firm but that causes my hips and shoulders to hurt. If it's too soft my back hurts even worse. This topper has been my happy medium. It adds the softness I need for those pressure points but not so soft that it defeats the purpose of having a firm mattress. It's still like sleeping on a cloud. I've slept the best ever since putting it on the bed. The first few days that's basically all I did was sleep and that's ok bcuz I needed it. I wasn't awake after a couple of hours bcuz my pain level was out the roof. I've been in heaven! I've read some reviews where ppl have bought 2 and put both on. I could see were that would make an instant fluffy fluffy pillowtop. It's still pretty fluffy with just one! I have a king size so my Aide has to take it to the laundromat to wash in the big washer and big dryer. I think any size should be taken to the laundromat anyways! That's where I messed up before when I had a full size bed. Putting toppers in a home washer, even a large capacity is gonna mess it up. Especially if your washer has an agitator. So far so good with this one being washed. Oh yeah, haven't been sweating either! You're not gonna go wrong with this one. Go ahead and spend the extra $20-$25 IT'S WORTH IT! All the others I've bought have been around the $60 mark and didn't last. Wished I'd found this one first. It only took two days to get to me. Another plus! Best money I've spent. Love it!!It fit my California King perfect. Felt great to sleep on.