3 Different Uses: Children wearing a backpack with a rein; With the hanging buckle, one end of the anti-lost wrist link can stick on children's back, and one end on parents' hand; Use the anti lost wrist link in both parents and children's hands. Durable: The wrist link with thick steel wire and covered by polyurethane which prevents rain and breakage, which is firm enough to withstand twisting and daily pull, good elasticity, not easy to break. Security lock The upgraded key lock provides an extra level of security. The anti-lost wrist link is made of strong stainless steel wire and durable PU material that is safe for the human body. Adjustable Harness: The shoulder straps are freely adjustable, can be adjusted according to the needs of the children, and greatly relieve the pressure on the shoulders. Soft and comfortable:Made of high-quality cotton, the wristband is breathable and comfortable for children's hands. The size of the bracelet can be adjusted according to your needs