I purchased these sheets to fit my pro adapt mattress. When I unzipped the bag, before I even took them out of the packaging, I realized I made a huge mistake. I proceeded to wash and put on my bed. The knit made it almost impossible to make the bed as they stuck to everything. The top sheet was too wide and almost hit the floor. After 2 nights of sleeping on them, I took them off. No wonder Tempur Pedic has a no return policy, they know that their sheets are overpriced and inferior quality.