Unbreakable Leather Dog Collar &ndash; Waterproof, Smell-Proof, Crack-Proof Biothane Synthetic Leather Harness Unbreakable And Un-Chewable! Extra durable Biothane holds 1,000 lb, is used to control large horses, and wont tear when your dog tugs. Dog Go For A Swim? No Problem! Normal leather corrodes quickly when wet. Waterproof Biothane never smells and keeps its original color, strength and smooth padded texture for years. Effortless Cleaning! Just throw your collar in the dishwasher or washing machine. A Perfect Fit For Your Pet! Non-bulky, non-chafing, lightweight design. Choose from small, (15-20) medium (19-24) and large (23-28) sizes. Choose Your Favorite Color Combination!