I recently got the Sleep Philosophy - Serenity 3M Scotchgard Waterproof Mattress Pad because with having a pet that likes to sleep on the bed I wanted something waterproof.  When I took it out of the package I was surprised at how soft the material was.  Very nice!  Being that it has waterproof material, it does make crinkling sounds when handling it, which I'm hoping will dissipate over time with use.  I used it on a pillowtop mattress that is about 14" thick & it was a really tight fit.  I wanted to try it on my 18" mattress but given how tight of a fit it was on the thinner mattress I decided not to try it.  Overall this mattress pad does exactly what I had hoped for it to do & have been happy with it so far.