When the weather outside is frightful, you can add these snow grips to your shoes or boots for added safety. The rubber grips stretch to fit over your footwear and have 5 metal cleats on the bottom that grip the snow and ice to give you better traction. Keep them in your car or purse for emergencies or anytime the weather makes walking hazardous. Thermoplastic elastomer and iron. Set of 2. Sizes available in Medium (fits women's size 5-10) or Large (fits men's size 6-11).