Firmly weaved Nylon for maximum quality & durability. Easy and Convenient. Great for crate transfer, potty breaks and training, no collar or harness needed. Our bespoke rubber stopper which locks in position, means that once you have set the position of the rubber stopper on your lead to fit around your dogs neck and head, it will not move, allowing you to gain greater control of your dog. As your dog moves in different directions, the lead will not tangle as the bespoke swivel mechanism works with your dogs movement rather than against to avoid the very common 'tangling lead' situation we have all experienced. Bully Billows Anti-Tangle Slip Dog Lead which is rigid enough while walking your dog but supple enough to move freely.