Model: BA - 020 Size: 26 * 20.5 * 15.5 CM Weight: 370g/ piece Color: navy blue, gray blue, sapphire blue, black Cushion core material: high density memory cotton Disassemble and wash: disassemble and wash FEATURES: 1. SCIATICA, BACK & HIP PAIN RELIEF AT NIGHT: Ergonomically designed knee pillow fits comfortably between your knees and provides maximum support and comfort at night that helps relieve sciatica pain and pressure on the lower back. 2. PREMIUM HIGH-DENSITY MEMORY FOAM: Made with 100% premium quality durable cut memory foam to provide long lasting comfort for hours, superior to other pillows it won't go flat over time 3. ERGONOMIC DESIGN: Ergonomic contoured design keeps your legs, hip and spine in ideal alignment while sleeping and improves circulation 4. BREATHABLE EASY CLEAN COVER: Breathable zippered cover ensures the pillow does not get warm and is machine washable for easy cleaning