Effectively prevent babies from getting lost: You can hold the belt in your hand and control the range of children's activities in shopping malls, supermarkets, parks, zoos and other crowded places, as well as prevent them from entering in dangerous places such as roads and rivers. Relieve the fatigue of the mother and protect the baby: the size of the baby 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 little arms. With our anti-lost backpack, you don't have to hold your child again, just pull the belt and it's much easier. Eco-friendly cotton material, hook, adjustable shoulder strap: pure cotton backpack, comfortable and breathable. Removable hook, durable. The shoulder straps are freely adjustable and are suitable for all ages, whether they wear thin summer clothes or thick winter clothes, even for adults. Give the baby a space to move freely: what the baby likes most is not to be pulled by his mother, but to run happily. You can remove the belt in a safe place. At this time, the anti - loss backpack will become the child's favorite toy and allow the baby to move freely. Size: 20*19*4.5cm/7.87*7.48*1.97inch; Due to different measurement methods, 1-3cm measurement error is a reasonable range.