[2 USES] Can be either a child safety backpack or an anti-lost wrist link. You can completely remove the reins from the harness and attach the reins to an extra cuff, then you get a wrist link. Easy and quick to put on and doesn't take up much space in a bag when not in use. The chest strap closes with a buckle so that children cannot open it. [Safe and comfortable materials] Climbing safety material for straps, pearl cotton for handles and shoulder straps, thick soft cotton pads, breathable cotton for the vest. It is suitable for all seasons, safe and comfortable. [ELASTIC CABLE] Durable and easy to stretch wire up to 200 cm to increase space activities, so that children will feel more comfortable. Contains wire to maintain shape even with multiple pulls, more durable than other similar products. [KEEP YOUR CHILD CLOSE] You can hold the leash in your hand to control the children's activity area in the shopping mall, supermarket, park, zoo and other places where there are many people, and prevent them from going to dangerous places such as roads and rivers. [ANTI-FALL AND REDUCE YOUR WAIST FATIGUE] The baby's height is much lower than adults. You may get back pain from bending down to pull the baby. It is also easy to strain the child's young arm. With our anti-lost harness, you don't need to hold the child again, just pull the leash and it will be much easier.