Craft of polyurethane foam with rebounds, it maintain firm without sagging even after daily use The dense PU surfaces resists water absorption—simply wipe away dirt with a damp cloth for easy maintenance Features waved like protrusions that pressure points on your neck, effective physical massage for relaxation Ideal for bed, sofa, offices rest, or home therapys supplies, this neck massager pillow helps ease cervical long time use The curved design perfectly fit the natural shape of your neck, providing gentle traction to relieve stiffness and discomfort while lying down