Bark’n Boots Grip Trex all condition, all-terrain, all-season paw wear by Ruffwear. The Bark’n Boots Grip Trex feature two major advancements in dog boots-an upper inspired by human shoes and a high performance Vibram sole. Built on an anatomical mold, just like human shoes, the boot’s upper maintains a consistent size, shape, and fit. The revolutionary upper design and construction ensures the boots are easy to put on, easy to secure, provide continued comfort, and most importantly, the boots stay on paws-from the first mile to the last. For the revolutionary sole, these boots are created with the world’s leading developer of soles for active pursuits.Keep in mind that asphalt gets very hot and can burn your pet’s paws. Protective Boots are a good way to protect paws from hot pavement. Find out more about aging pets Great for senior dogs Reduces slippage on hard wood floors Four red boots included Sizing: XS: Paw Width 2.25 inches. Small: Paw Width 2.5 inches. Medium: Paw Width 2.75 inches. Large: Paw Width 3 inches. XL: Paw Width 3.25 inches. XXL: Paw Width 3.75 inches.