QC Quality Choice - 8 Hour Heat Wrap. For Back & Large Areas - Comparable to Thermacare, this product offers temporary relief from minor muscular and joint aches, as well as pain linked to overexertion, strains, sprains, and arthritis, particularly targeting the back and larger areas of the body. Enjoy up to 8 hours of relief with its long-lasting penetrating heat, delivered through ultra-thin, air-activated single-use pads.