If you struggle to keep your head cool while you sleep especially in the warmer months this coolblue pillow is perfect it has been specially designed to provide soft foam comfort without any build up of heat the outer layer of the pillow is made from specially developed coolblue foam inside it is filled with flakes of visco elastic memory foam that gently mould to your head whilst allowing the air to circulate to prevent you over heating a beautifully soft support pillow it is perfect