These Heat Wraps for Low Back and Hips from up&up are designed to provide pain relief at home or while on the go. Made from breathable and soft nylon, these heat wraps include three heat treatments, one back wrap and six heat pads to easily treat common muscle aches and strains. The air-activated heat pads increase the flow of oxygen through blood vessels and promote healing in damaged muscle tissues. These nylon heat wraps are designed to fit the back and hip areas snugly to provide up to 8 hours of pain relief. These air-activated heat wraps relax, soothe and unlock tight muscles to keep you comfortable throughout the day. We believe making smart choices for the people, places, and pets in your life should be easy and affordable. And, having quality you can trust should be a given. Thats why you can count on our promise caring for your everyday in every way. Satisfaction guaranteed Love it or your money back.