I bought this mattress pad for our granddaughter.  She let us sleep in her bed that had a foam pad over the mattress that made it very comfortable.  But when we tried to remake it, it was very difficult to get the fitted sheet over the foam without it bunching up.  So we gave her this mattress pad to put over the foam, and now she reports it is even more comfortable and she doesn't have to fight the foam every time she changes the sheets.  It fit perfectly, and she loves having the mattress pad.