Provides temporary relief of minor muscular and joint aches and pains associated with overexertion strains sprains and arthritis. Relaxes tight muscles. Long lasting pain relief; provides 8 hours of heat. Patented heat cells penetrate deep. Air-activated one-time use. Ultra-thin discreet comfortable and odorless. This size will fit: Womens pant size: Size 9 up to size 20 Mens pant size: 35 inches to 47 inches.Other products from HerbsPro