Chest Belt Chest Strap Backpack Anti-slip Strap for Children and Adults Product Details Top Highlights ★ This is a strap that prevents backpack shoulder straps from slipping off. By attaching it to your backpack, it prevents the shoulder straps from slipping off your shoulders and frees up your hands. ★ The belt length can be adjusted, making it suitable for both small children and adults. With adjusters, the length can be easily adjusted. ★ It comes with a one-touch detachable buckle for easy on and off. Since it's easy to attach and detach, even small children can use it with ease. ★ Includes two D-rings for attaching lightweight items such as sunglasses and keys. ★ Size: Width approx. 25mm, Total length: Max approx. 40cm (adjustable). Applicable: Backpacks for children and adults, school backpacks, commuter backpacks, hiking backpacks, etc.