SandPuppy HeatWrap is a versatile heating pad with adjustable heat settings. It is perfect for pain relief in the back, knees, shoulders, and elbows. SandPuppy Heatwrap is a versatile heating pad made with a soft velcro fabric and has been specially designed to be convertible to fit the back, knee, shoulder, and elbow. Just strap it on around your ache and let the soothing heat relax you. The application of heat relaxes muscles, warms them up, lubricates joints, and eases muscle spasms. What s more, heat therapy is non-invasive and chemical-free, making it absolutely safe for anyone. SandPuppy Heatwrap fits snugly around multiple parts unlike most heating pads and provides deep penetrative heat. It is a perfect, versatile, lightweight, and safe heating pad that provides quick relief.