Lifeful&reg; Small Dog Spring Summer Waterproof Nonslip Zipper Mesh Boots, Comfy, Cool and Flexible, Yellow Color, Set of 4 Upper is made of breathable mesh fabric with black selvedge, cool and comfy for paws, competent to keep debris and dust out. Water-proof and nonslip thermal plastic rubber sole, capable to provide traction and protect paws against hurt from sidewalk, asphalt, water, grass, mud, rocks, salt, docks, boats etc. A full zipper at the back makes it very easy to put on, while the adjustable Velcro strap provides another flexible closure. The back tongue efficiently avoids hair being caught in the back zipper. Lightweight, flexible and durable boots, act as a reliable partner for dogs in daily sports or travel during spring, summer and early autumn. Size XS: Sole Length 2.32, Sole Width 2.05. Usually Sole Length should be about 0.16 larger than Paw Length; Sole Width should be about 0.16 larger than Paw Width.