The Zero DC LEASH is equipped with a shock absorber, which mitigates any jerking or running away of the dog. It is used together with a dog harness and seat or belt. This leash is for 1 dog weighing up to10 kg. Product Specifications: Strap width: 25 mm Length when fully extended: 2.7 m Carabiners: 60 mm (up to 10 kg) Material: 100% polyester, made from a strap with rubber in it Machine washable up to 40C (we do not recommend drying in the dryer)