This mattress cover does not fit our TempurPedic Adapt Medium Hybrid. In fact, it is so loose it bunches up, slides all over and is miserable to sleep on. After 1 washing, the material on the under side of the cover is fraying and looks 5 years old (wash only on cold, no dryer). TempurPedic is not backing this product, so we would advise Do NOT BUY.