Human bionic design, 360?? fit, cervical spine comfort enhancement 99.9%, sleep on your stomach is not tired, wake up more relaxed. The filler is made of food-grade EPS foam particles, safe and odorless, lightweight, and moderately filled, The U-shaped pillow is soft and fluffy, fits the body lines, always follows your posture changes, and has a comfortable shape. Ultra-soft crystal velvet fabric, soft texture, smooth and elastic feel.