This is a wonderful cover for the memory foam topper. I slept on a foam topper without a cover for three years and was not happy with just a sheet covering it. Stains were not able to be removed and the foam deteriorated with time, animal claw gauges and rips. This cover can be cleaned and gives some nice padding. It does slip on the mattress which is annoying, but I solved that by putting a non- slip rug pad between the mattress and the topper and it stays put. It is too bad one isn't supplied with the cover.