Bless you: Polyurethane is the main material in Coolfoam, an environmental protection material that can come in direct contact with childrens skin. Anti-bias head, flat head, protect the childs healthy growth. Excellent moisture absorption and permeability: It can absorb water without squeezing, while it can absorb water, it starts releasing moisture, keeping you dry and not sticky. Certified foam material brings your good health: through Premium CertiPUR-US, Swiss SGS Germany TV double international test mark. Kid sleep, the pillow is the most important: Moderate temperature, more comfortbale. Lock body for you the most comfortable temperature 33 .You may notice an odor on arrival of the pillow please assure that it is harmless of course from the memory foam The odor should dissipate within a few days of unpacking. Do not wash the pillow foam inside, only the pillow case is washable. Since the pillow is vacuum-packed, creases may appear when the package is opened, and the creases will disappear after a few hours if placed in a ventilated place.