ZERO STARS.  DON'T BUY!
Don't be fooled by the description; these are NOT luxury Bamboo sheets!!  They are 40% microfiber and for two nights I have worken up in a total wet sweat from these sheets.  I just want to strip them and burn them.  I have 100% rayon bamboo sheets and they are totally different -- they do sleep cool but these may as well be thermally lined wool.  The bottom sheet didn't even fit my mattress well.  Cheaply made.  Bad bad purchase.