This fits perfectly on top of the Murphy bed in my RV and is surprisingly comfortable for a 4 inch mattress topper. It folds up nicely with the mattress when putting the bed away.Recently, we decided to try a bed-in-a-box mattress for our guest bedroom. We chose the Zinus here at Amazon, and love it, but realized that some of our guests might prefer something softer and fluffier.So, I requested this mattress topper, and it's absolutely perfect!The topper is firm enough for great support, but also has that plush, luxurious, soft feeling.Also, it's very well-made. Nice materials, well-stiched. No odor.We took this mattress topper out of its packaging and let it sit for 48 hours, so it expanded to its full loft.Then, we put it on our guest room mattress. The elastics that hold the topper in place are very nicely designed. They're nice and wide, and the right mix of flexible but sturdy.For comfort alone, this topper earns five stars. Add all the other benefits - great materials, no odor, super design - and it's a remarkable value. Highly recommended!I've had my memory foam mattress for 8 years. Its gotten very worn-in, so we literally sink into it. A little too much I might add. So I got this mattress topper, and wow what a difference it makes. Its soft, yes. But its also firm, where it supports the natural curves of your body. I absolutely love the nonslip cover it has on it, and it allows you to strap the corners to your mattress. Straps are adjustable so it fits different sized mattresses. It did have a smell out of box, but so did the foam mattresses I bought for my kids(from the store). The smell is gone within 2days of airing out. Overall, Its a fantastic mattress topper, you can't go wrong with this one.I am very happy with this mattress topper and would absolutely recommend it.The materials are high quality and the product is very well made. The bottom side of the topper has a grippy texture so it won't slide around on your mattress. The straps also help to ensure it stays in place and have a great range of adjustability. The foam won't completely flatten after laying on it for a long time (I've had that issue with some low-quality memory foam) and still lets the curves of your body sink in perfectly.It does its job well and has turned an otherwise extremely uncomfortable sleeping option into a much more comfortable and pain-free option.I have this on my guest room bed and all of my guest compliment on how nice that mattress is little do they know it’s not the mattress it’s the mattress topper it’s breathable doesn’t retain body heat seems easy to clean but I haven’t had to do so fits underneath all of my bedsheets perfectly without them being deep pockets. This would be perfect for someone who sleeps hot or just needs a bit of added comfort to their every day mattressI got this topper because my mattress is getting a little springy, but this topper helps so much, it's thick foam and super comfortable, I'm glad it straps onto the corner of the bed and you can adjust the straps, it really prevents it from sliding around, I sleep so much better now!10/10Mattress topper makes it feel like you are sleeping on a cloud. Surprisingly the cover doesn't make the bed too hot which is great.This mattress topper fits our king bed perfectly and it's extremely comfortable. I sleep in my side or stomach and this topper has really made my sleep more comfortable.