We are on our second Tempur-Pedic mattress. We originally had a Cal King and the Tempur-Pedic-Pedic branded mattress protector for that mattress worked well for nearly 10 years. We recently purchased a split king with a moveable base. Naturally, we opted for the Tempur-Pedic branded mattress pads for this new bed as well. The product was not as expected, particularly for the high price charged for the cover. While the cover itself is padded and appears of high quality, it does not fit the mattress well. Even in the flat position, the cover is slightly oversized - not the tighter fit I would expect in a fitted mattress cover. This, in turn, causes our fitted sheet to bunch up. I'm very surprised that the mattress maker is unable to offer a mattress cover that is supposed to fit their own mattresses. Very disappointed.