Breathable & Wicking Cover: Outer layer uses ventilated fabric to keep the pillow dry and comfortable, reducing nighttime dampness Ergonomic Design: Encourages correct spinal alignment when placed under knees while lying on your back, reducing lumbar tension For side Comfortable Side: Made with supportive memory foam for gentle cushioning, helping relieve leg pressure during side Ideal for frequent side sleepers to promote better rest with this knee pillow Multiple Usage preferences: Works as leg, back, or neck cushion Great for home, work areas, or travel Detachable & Washable Cover: Features a removable zippered casing for simple cleaning, ensuring cleanliness