Elastogel All Purpose Therapy Wraps are the most universal of all wraps. Apply these wraps to all parts of the body. For smaller areas such as forehead, elbow or ankle the recommended sizes are the 4x24 or 6x16 wrap. The 6x24 is recommended for areas such as, knee and neck. When treating larger areas such as leg, shoulder, chest or back our 9x24 is perfect. Additional lengths are also available. Product is also sold by the each unit. Elasto-Gel Therapy Products are designed to provide moist heat therapy or soothing cold therapy for relief of minor muscular and joint aches and pains. The hot or cold therapy will last 20 to 40 minutes per application. The product is held in place with hook and loop type closures, which allow the user to move about during therapy. The product is microwavable so it can provide nearly continuous heat therapy. When used cold, the product conforms to contours, even at -20F (-30C), allowing comfortable soothing cold applications.