Mueller Hot/Cold Therapy Wrap. Ideal for the application of cold or hot therapy to small or large body parts. Adjustable side flaps and a detachable extension strap (large wrap) help secure the therapy wrap in place. Small wrap holds one 4 3/4 x 6 reusable cold/hot pack. Large wrap holds one 6 x 9 cold/hot pack. Soft gel refrigerates for cold therapy and microwaves for heat therapy. Recommended for treatment of minor scrapes and bruises muscle aches and sprains headaches and minor burns.