Ergonomic Design: The Knee Pillow is ergonomically designed to fit comfortably between the legs, providing ideal alignment for the hips, knees and back.Premium Pillow Core: The Dioxide Pillow is made of hardened memory foam. Memory foam provides long-lasting comfort and reduces pressure on your leg. it firmly supports your legs to reduce pressure to your legs. For transportation, the pillow is compressed.BREATHABLE & EASY CLEAN COVER: The Knee Pad offers excellent breathability to keep your legs cool no matter how badly you touch it. Removable and machine washable.Knee pillow for better sleep: A more relaxed posture at night can definitely help improve your sleep quality and leave you feeling more energized the next day, eliminating one of the main reasons for pain and stress.