I have been a loyal Tempur-Pedic for many years...including the sheet sets. In the past, the bamboo sheets have been phenomenal but unfortunately they no longer offer this item. The new ones are bamboo but also a jersey type which is very stretchy...The stretching is unbelievable...never knew a fabric could stretch that much and not sure why they would make sheets out of this material. The sheets are too big for both the fitted (KING) and the flat sheet hangs down to the floor because of the stretch. HOWEVER, my biggest complaint...is that after less than a week of use, they are starting to pill. That is crazy!