I have purchase 8 of these pillows to replace all of the pillows at home. I was advised by the store associate on which would be the best pillow for myself. They made me lay down and try pillows until they decided that this prolo medium would be the best to keep my back aligned with my neck. Well, this pillow is HORRIBLE! Expensive for no reason (maybe you pay by the lb because it weighs a ton!). I can't sleep because it is too high and it hurts my neck! Worst night with no sleep. I tried to have them changed at the store, but had no luck. Called customer service and had NO CUSTOMER SUPPORT. Do not waist your money thinking that temper-pedic pillows are great because they are awful!