Ergonomic design: Designed to keep your hips, legs and knees aligned in a natural horizontal position as you sleep. Memory foam: Features a memory-foam filling for extra comfort, with a polyester cover. Back pain relief: Side sleeping is known to add strain to your hips and back, but this pillow remedies that by keeping your body well aligned. Removeable cover: A removeable cover makes it super easy to wash. Options: Choose from one pillow or two. Body-alignment pillow: Get a leg support pillow for side sleepers. Leg Pillow For Side Sleepers | Living Social | Living Social