I hate this.  I don't know why it's gotten good reviews.  I was specifically looking for a mattress pad that dissipates body heat.  This one says it does.  It does the opposite.  I felt like I was sleeping on a heating pad, that had a very artificial, non-breathing feel that bothered me even through sheets.  I just purchased a new mattress pad, just a few weeks later, that is made of natural fibers that is better.