Durable rubber core elastic exerts compression over the soft tissues of the elbow, fitting comfortably around the bony prominences of the joint. Anatomic design works in concert with the motion of the elbow. Encircles the elbow like a bandage but without the bulk. Durable, high quality elastic sleeve absorbs perspiration for all-day wearing comfort. Easy slip-on, slip-off application and removal. Measure around the bend of the elbow. Available sizes: Small (8.5-10 Inches), Medium (10-11.5 Inches), Large (11.5-13 Inches), and X-Large (13-14.5 Inches).