Lull's memory foam pillow gives two levels of comfort. One side is soft and the other side provides more firm support, so one can choose their ideal level of comfort. Cooling gel infused foam pulls heat away from the head for a cooler night's sleep. It also features a removable and machine washable cover for easy care. The CertiPUR-US certified foam doesn't contain ozone depleters, flame retardant chemicals or heavy metals.