DO NOT PURCHASE A TEMPUR-PEDIC MATTRESS!!! We purchased a Tempur-Pedic California King mattress for a very large sum of money and requested a refund as the mattress has a LARGE bump in the middle of the mattress after less than 4 months of use. While we were previous Tempur-Pedic owners for nearly 20 years, this experience just shows that you cannot trust the quality of the company products any longer. Terrible experience, horrible customer support, no empathy, and not reliable. NEVER AGAIN! We tried working with the company and their standard warranty response is "Sorry, your pictures do not show enough of a depression up to 3/4"", and this is without regard to how long you have used the mattress nor does it take into account that the middle of the mattress is higher than either side.