TheraPearl combines the healing power of Hot & Cold therapy into one convenient pack. Enjoy extraordinary relief from your everyday aches and pains and feel the optimal therapeutic benefit as the Pearl Technology conforms to your body. INTENDED USE: Reusable therapeutic hot and cold pack for use with common aches, pains, swelling and bruising. Packs are designed to retain a therapeutic temperature for approximately 20 minutes. Cold Therapy: Freeze for at least 2 hours Heat Therapy: Heat in microwave for specified time Reusable Hot & Cold Therapy Conforms to your body to deliver soothing relief from: Sore Muscles / Arthritis Swelling / Inflammation Aches / Pains and More! Contains one TheraPearl Sports Pack with Strap - 7.5in x 4.5in (19.1cm x 11.4cm)