Half Round Bolsters are our most popular and versatile bolsters, and when placed under the knees, ankles or neck, help relieve muscle strain. Comfortable half round bolsters with zippered outer case which can help your clients achieve the maximum therapeutic value. Half Round Bolsters padded design allows infinite positioning for ultimate comfort. Hypoallergenic medical-grade foam distributes weight evenly,more controlled sleep posture to address pain. Memory foam on top of a highly resilient base foam provides enhanced comfort while preventing the pillow being compressed into "flat".