The Pet Life Elastic Flexible Rubberized Dog Shoes are composed of Supportive Natural Rubber. Features high ankle support. These Performance Rubberized shoes serve multiple purposes. These shoes protect your dogs paws from the Hot Asphalt during the summer and helps prevent frostbite during the colder winter climates. Perfect for Dogs in operation recovery and older dogs in need of higher ankle support and traction. These shoes can be worn over and over again. These shoes also feature tiny rubberized bubble grips on the bottom for further traction. Features Velcro straps for easy on and off access. Available in Multiple Sizes and Colors. Comes as a set of 4. Sizing Instructions: Please measure the Sole of your Pets Foot - Length x Width ("In" Inches): XS: 1.4 x 1.1 SM: 1.7 x 1.2 MD: 1.9 x 1.5 LG: 2.3 x 1.8