Silver Rest Sleep Shop Serenity Chip Pillow, Queen 100% Polyester Imported The design of the visco elastic memory foam clusters within the pillow allow for air flow that maximizes temperature coolness The memory foam clusters move independently providing body conforming support relieving pressure on your neck, shoulders and back for a restful night sleep This traditionally shaped pillows is filled with clusters of visco elastic memory foam The plush 80-percent cotton or 20-percent polyester velous zippered cover is removable, washable, anti-bacterial and allergen resistant The plush 80-percent cotton or 20-percent polyester velous zippered cover is removable, washable and allergen resistant