Knee Pillow 100% memory foam core for lasting comfort and shape retention The inner core is made of memory foam, designed to maintain comfort over time without deforming. Ecofriendly, odor materials Pure materials that are environmentally friendly and nonsmelling. Breathable, removable cover with easy care Removable zipper cover stays breathable, helps prevent heat buildup, is skin friendly, and is machine washable for easy cleaning. Ergonomic design validated by real users Designed after testing with 500 real people over 30 days, aiming to improve blood circulation and help prevent pain in knees, legs, thighs, calves, waist, and other areas, supporting better sleep. 23 practical use scenarios Sidesleeping support Place the pillow between your knees to align hips and reduce pressure on the knees, legs, and waist for more comfortable sleep. Travel and long sitting Use during flights, commutes, or long periods of sitting to support legs and promote circulation. Postworkout or daily rest Rest with the pillow to ease leg fatigue and support recovery in knees, legs, thighs, calves, and waist.