Chest Strap Chest Belt Backpack Slippage Prevention Shoulder Backpack Belt Shoulder Strap Fix Adult Child Applicable Black Chest Belt Chest Strap Backpack School Bag Slippage Prevention Child Adult Chest Strap Black belt Price for one This is a band to prevent the shoulder straps of a backpack from slipping off. By attaching it to the backpack, it prevents the shoulder straps from slipping off the shoulders and frees up both hands. The length of the belt can be adjusted, so it can be used by small children to adults. With an adjuster, you can easily adjust the length. With a one-touch detachable buckle, it is easy to put on and take off. Easy to put on and take off, so even small children can use it with ease. Two D-rings are included for attaching light items such as sunglasses and keys. For children's and adults' backpacks, school bags, commuter backpacks, mountain climbing backpacks, etc.