Effectively prevent the baby from getting lost: you can hold the leash in your hand to control the children's activity range in the shopping mall, supermarket, park, zoo and other places where there are many people, and prevent them from going to dangerous places of places such as roads and rivers. Relieve your mother's fatigue and protect your baby: the baby's height is much smaller than that of adults. You may have back pain from bending over to pull the baby. It's also easy to strain your child's young arm. With our anti-lost backpack, you don't have to hold the child again, just pull the leash and it will be much easier. Eco-friendly cotton materials, metal hooks, adjustable shoulder strap: The backpack in pure cotton, comfortable and breathable. Removable metal hook for durability. The shoulder straps are freely adjustable for all ages, whether they wear thin summer clothes or thick winter clothes, and even adults can wear it. Give the baby a free space to activities: the baby's favorite thing is not to be pulled by the mother, but to run around happily. You can remove the leash in a safe place. At this time, the anti-lost backpack will become the 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 100cm/39.37inch, 1-3cm error of measurement is a reasonable range due to different measuring methods