The ContourSleep Knee Spacer aligns your spine and supports your knees with pressure sensitive memory foam. This hourglass shaped knee pillow creates a comfortable cushion between your two legs. This way, your legs can have their own separate padding instead of laying on top of each other. For side sleepers who wake up with morning stiffness in the legs or joints, this knee cushion can improve circulation, help you sleep easier, and make your legs feel rejuvenated.