The shock absorbent 84 Crew Ruff leash for dogs is part of the Keith Haring x Artist Edition. This leash comes with a sturdy super hook that includes an easy-to-use locking screw for extra safety. The polyurethane spring absorbs the shock that normally goes to your shoulders. Small Ruff leashes are longer, ideal for smaller dogs. Large Ruff leashes are shorter, for bigger and taller dogs.