We have a zippered allergy cover on our king mattress and I was having to remove it to wash it too often until the zipper finally broke. I was looking for an additional layer between our sheets and the allergy cover so that I wouldn't have to remove it as much, and this mattress pad fits the bill perfectly. As other reviewers have mentioned, it is pretty thin and not overly "cushy" but this doesn't bother me since I wasn't looking for "cushy". The 100% cotton is great and keeps us cool at night. I will say that it is a bit of a tight fit and the padded part doesn't quite cover the entire top of the mattress toward the edges. That, combined with the high price, is why I gave it 4 stars. But overall we are very satisfied!