Provides temporary relief of minor muscular back aches and pains associated with overexertion, strains and sprains.Women"s Pant Size - size 4 to size 20 Men"s Pant Size - 28 - 47 inch waistPowerful Pain Relief + Deep Muscle RelaxationAir-Activated - Just open pouch, starts to warm on its own8 Hours of Heat - Long-lasting relief2 One-Time Use WrapsOdorless, Ultra-Thin, Comfortable, Discreet