Item Type: Tourmaline Self-Heating Elbow Pad Material: Polyester, Spandex Functions: Improve Blood Circulation, Promote Metabolism, Clear the Meridians, Enhance Immunity and Protect Your Elbow Color: Black Quantity: 1 Pair Size: approx. 34 x 15.5 cm Weight: approx. 36 g Features: Self-Heating Elbow Pad, Tourmaline Elbow Pad, Self-Adhesive Elbow Pad, Arthritis Protector, Comfortable Elbow Pad