Sleep Studio Sleep Joy ViscO2 Memory Foam Contour Pillows, Set of 2 Set of 2 contour ViscO2 memory foam pillows for back and side sleepers; molds around head and neck for custom support Breathable ViscO2 open-cell memory foam for a cooler sleep surface; made with plant-based ingredients Dual bolster design with choice of high or lower loft Zippered, white velour pillow covers remove for machine wash; spot clean the memory foam 100% Polyurethane