SLEEP ZONE Twin XL Cooling Mattress Topper for College Dorm, Premium Zoned Cool Mattress Pad Cover, Padded Mattress Protector Breathable Washable, Deep Pocket 8-21" (White, Twin XL)

They don't tell you on the page how deep the cover itselfis. I don't believe they have 13,000 reviews either

I bought this replacement mattress cover because my other one kept shifting (within days of making my bed, previous covers would move and cause the sheets to get loose on the bed) and because I’ve had problems with night sweats for years. It takes care of both issues extremely well! I’ve had no problems with the sheets moving, nor have I overheated once. It seems like it’s the first one I’ve bought that I haven’t had any problems with.I bought the white cover, which has a very comfortable quilting and makes it feel very soft when laying on it. Because of how soft it is, I was worried that this was going to be another waste of money. However, I’ve been pleasantly surprised, and despite weeks of sleeping on it, I have not overheated at night once, nor have the sheets moved.I uploaded the picture to show how deep the corners are and how comfortably, but snug, they fit under a deep mattress with a topper on it.I have a regular mattress on my bed and a 4” foam mattress topper, but the mattress cover fit perfectly over the deep corners and still had enough room left to go several inches underneath each corner. There is a wide elastic band that goes around the entire edge that make sure there is a snug fit, but without being too tight.The mattress cover fit well in my washer and came out still looking great. I haven’t had it very long, so I can’t yet say it’s durable, but the few weeks I’ve had it, I haven’t noticed any runs in the corners when I change the sheets, which is already an improvement over other covers I’ve tried.I’d certainly recommend this to others. It is a great value for the money and I don’t think you’ll be disappointed.

Antes de comprarlo, vimos y tocamos varias opciones. Ni las mejores y caras marcas nos convencieron. Buen precio, Muy confortable, nuestro colchón está seminuevo y al colocar este cubre colchón le dio mayor comodidad, fresco para las temperaturas habituales de 27 a 32 grados donde vivimos ese siente suave y como si estuviéramos sobre una capa de algodón gigante.

We have a new comfy mattress that was supposed to be cooling, but the cover it came with radiated heat back at me all night and was literally hot to the touch after I'd been lying on it. Since buying this mattress cover I've had much better and cooler sleeps - it seems like it absorbs your body heat rather than traps it. The padding is a bonus. It has deep pockets and fits our 12" high mattress perfectly.

This is a mattress protection there is no padding so it’s good for protection but that’s it

Very comfy