The anti-suffocation pillow helps your baby breathe properly during sleep thanks to its perforated inner structure and 100% cotton special production fabric. It can be used from birth up to 2 years old. Outer 100% cotton, Inner polyurethane. There may be a color change in the sponge over time. No matter what position your baby sleeps in, this pillow will breathe comfortably. The perforated sponge inside allows the air to circulate comfortably inside, thus preventing your baby from suffocating even if their mouth and nose are closed. , , WASH : Before washing, take out the sponge inside. Wash the cover in the washing machine with a gentle program at 30 degrees.