The Flexi Retractable Dog Leash is the perfect way to give your dog freedom to roam while still being in control. It has a patented braking and recoil system that makes it easy to operate and control your dog. It retracts automatically when your dog comes closer to you, or you move towards your dog. A lock button allows you to fix the Flexi at a certain length. The ergonomic soft-grip handle makes it comfortable for you. A chrome snap hook makes it easy to attach to any collar. Item Specifications: Sizes: Small: dogs up to 44lbs, extends 16ft Medium: dogs up to 77lbs, extends 16ft