The Pet Life Lightweight Air-Mesh Dog Shoe Sneakers are composed of Lightweight and Breathable Mesh Fabric thick Outer shell. Features a Back Zipper and Double Wrap Around Velcro for Easy On Off access and added support and comfort. These Dog Shoes offer a higher level of ankle support. Features Rubberized Grips. These Shoes are essential during the Hotter weather climates protecting your dogs paws by helping Protect your Dogs Paws against the Hot Asphalt Terrain. Essential for Dogs in Recovery and especially elder dogs and puppies. Sizing Instructions: Measure the Sole of your Pets Foot - Length x Width (inches): XS: 1.97 x 1.77 SM: 2.17 x 1.97 MD: 2.36 x 2.17 LG: 2.76 x 2.32