?Compact Size?For toddlers 1-3 years old up to 50 lbs. The length of the shoulder straps can be adjusted freely. Fantastic little backpack perfect for your child's essentials such as nappies, wipes, bottles, changes of clothes, snacks, toys, etc.?. ?Adjustable Wristband Safety Lock 8.2 Feet Stainless Steel Wire?The toddler leash wristband could be adjusted to max 7 inches. It has a security lock so your child cannot easily remove it and a small key on the parent's wristband. A wire runs through the middle, which prevents it from being easily cut with a small knife. A length of 8.2 feet from the leash is sufficient as it provides distance but in a safe manner. The optional leash is substantial and does not stretch or snap quickly. ?Premium Material?Miraitowa toddler backpack leash is lightweight and the baby safety wristband is made of super soft breathable foam pad and Velcro angle straps, which can avoid scratches and sweat on the wrist, and is breathable and resistant to friction. ?Functional Appropriately Sized for Toddlers?The height of Miraitowa kids backpack is approximately 8.2 inches and width 7 inches, Miraitowa toddler backpack itself is only 0.33 lbs. The toddler's backpack has just enough room for him her to take all his her prized possessions on the road! Your child will enjoy carrying their treasure like a big kid. We do not recommend putting too much in, as this puts too much of a burden on the developing child. ?Keep Kids Nearby and Safety?Thanks to the sturdy wrist leash that can provide strong protection, the little baby can fully explore freely in outdoor activities. You will not have to worry about your child getting lost and wandering around crowded places such as supermarkets, parks, shopping malls, streets, subways, playgrounds, attractions, train stations, etc. ?3 Ways to use?kids can wear the anti-lost backpack as a common knapsack ?put on both ends of the anti-lost wrist link on kids and adults' wrist, easily connect the kids with parents together ? use the toddler backpack and wrist link together, use the toddler backpack leash to prevent the kids from getting lost.