So disappointed with the mattress cover. Heating up in bed has disturbed my sleep for years and was hoping this would live up to the claims on the website and I would remain temperate. I looked forward to going to bed but within an hour of nodding off I awoke very hot indeed wherever my body touched the mattress. Cooling down did not happen as expected, I stayed uncomfortably warm all night. It wasn't a warm night, my room faces north and the window is always open. I don't have a memory foam mattress , vile things, and sleep under a cotton sheet and wool blanket. I persevered for three more nights as I wanted so much to make it work but I had to take the cover off. I was definitely cooler without it on the bed. Trying to be impartial, I put it back on again and told myself to get a grip, it was my imagination and I would be a lot cooler if I only believed that wool was the answer. Unfortunately after four nights I couldn't take the overwhelming warmth from the mattress cover any longer, and so it is packed away. Weirdly, the pillow is !ovely and soft and though it does make my head very hot occasionally it doesn't seem to give me the awful dry burning heat sensation which the cover does. I am mystified. Can't fault ordering or delivery service though.