Memory Foam Leg Support Wedge Pillow by Science of Sleep. PILLOW is manufactured with Memory Foam designed by NASA with highly temperature sensitive, breathable, self-molding characteristics. Memory Foam permits airflow for ventilation and comfort and reacts to your body temperature by custom molding to your body shape, readjusting as you move and increasing weight distribution for maximum support and comfort. Feature: Elevation of your legs increases blood circulation, providing therapeutic relief from:Lower Back PainLeg CrampsMuscle SpasmsVaricose Vein ConditionsVersatile and adjustable from 5" to 9" by removing or adding the foam inserts.Provides comfort lying on back or side positions.Contour surface cradles your legs for added comfort and support.Replaces the need to stack regular pillows which can slip and slide. Allergy free and flame retardant (CAL 117).Soft, comfortable, and washable deluxe terry cloth cover.