Cold therapy to reduce swelling and help relieve pain or soothing heat for aching muscles and stiff joints. Includes two hot cold packs for coverage on front and back of shoulder. Comfortable and secure wrap holds cold packs in place. Adjustable under-arm strap. Neoprene blend wrap combined with hot cold reusable gel packs provide a consistent and long-lasting temperature during use. Reusable, safe, gel pack is microwavable and freezer safe for heat and cold therapy. Product Benefits.