Topcare heat wraps (hours of heat) for back & hip: powerful pain relief + muscle relaxation, air-activated (just open pouch, starts to warm on its own), one size (fits sm to xlg), odorless and ultra-thin. Provides temporary relief of minor muscular and joint aches and pains associated with overexertion, strains, sprains, and arthritis. 2 heat treatment includes 1 fabric wrap and 4 instant heat pads. This topcare product is laboratory tested to guarantee its highest quality. Your total satisfaction is guaranteed. *This product is not manufactured or distributed by procter & gamble, distributor of therma care. Powerful pain relief & deep muscle relaxation. One size, odorless & ultra-thin. Compare to thermacare*.