All Products are made with durable nylon webbing. Collars and harnesses feature Delrin Acetal side release buckles for ease of fastening and separating and solid nickel plated “D” rings for strength. The collars are easily adjusted for length and are available in many sizes. All Leads use nickel plated swivel snaps. Collars, leads, and harnesses are 100% guaranteed for materials and workmanship.