I purchased this mattress pad because it is one of the very few on the market that has no polyester.  Polyester is not breathable so I was having a difficult time sleeping until I found this 100% cotton mattress pad.  It is absolutely wonderful!  It is a great quality and washes beautifully.  For anyone who wants a polyester free mattress pad that is an excellent quality, this is the mattress pad for you.  I can't recommend it enough.