Muzzle is one of the best comfortable mouth muzzle. Adjustable strap with buckle, easy to put on. Adjustable nylon strap with quick release buckle and comfort strip for the dog's snout. Hook and loop fasteners closure, difficult for dogs to remove with their paws. Please measure your dog's snout circumference (between the tip of the nose and eyes) before you buy. If the measurements fall in between two different sizes, please order the bigger size for growing space/comfort.