The Elasto-Gel Lumbar Wrap provides an ideal therapeutic hot or cold application for lumbar back pain, caused by injury, tension or muscle fatigue. Unique shape conforms to the contours of the lower back and offers relief of minor muscular and joint aches and pains. It is a deluxe contoured thermal therapy wrap designed to provide both cold compress and soothing heat therapy to the lower back and hips. Specially formulated patented glycerine gel material with exceptional properties for transferring heat. The gel provides moist heat therapy or soothing cold therapy. These remarkable therapy packs are guaranteed to be 100 percent leak proof, even if punctured. Two sizes are available to ensure the best fit. Featuring wide and supportive Velcro strapping, the wrap moves with the user. Elasto-Gel Lumbar Wrap Features: Can be used for both hot and cold treatment. Contours to the shape of the wearer. Specially selected 4 way stretch outer cover. Tough flexible gel. Retains temperatures for 20? 40 minutes. Made in USA. Elasto-Gel Lumbar Wrap Specifications: Small/Medium Size: fits waist sizes 24? 36 inches. Weight: 4 pounds. Includes: One Elasto-Gel Small/Medium Lumbar Wrap.