Effectively prevent the baby from being lost: You can hold the leash in your hand to control the children's activity range in the mall, the supermarket, the park, the zoo and other places where there are many people, and prevent them to go to dangerous places such as roads and rivers. Relieve your mother's fatigue and protect your baby: The baby's height is much lower than adults. You may be have a back pain because you bent to pull the baby, It is also easy to strain your child's young arm. With our anti-lost backpack, you don't need to hold the child again, just pull the leash and it will be a lot easier. Environmentally friendly cotton materials, metal hooks, adjustable shoulder strap: The backpack made of pure cotton material, comfortable and breathable. Removable metal hook for durability. The shoulder straps are freely adjustable, can fit the children, whether they are wearing thin summer clothes or thick winter clothes, and even adults can carry it on. Give the baby freely space for activities: The baby's favorite thing to do is not to be pulled by the mother, but to run happily. You can remove the leash in a safe place. At this time, the anti-lost backpack will become a child's favorite toy, allowing the baby to move freely. Size: 20*19*4.5cm/7.87*7.48*1.97in; the leash is about 100 cm/39.37 inch, 1-3 cm error of measuring is a reasonable range due to the different measurement methods.