School backpack: The ZIPPY BACKPACK is perfect for children from the 1st grade of elementary school. The sliding back ERGO ADJUSTABLE SYSTEM allows you to adjust the optimal position of the straps according to the height of the child. It has an ergonomically shaped back and fully adjustable shoulder, chest and side compression straps for optimal fit. It has a flip-open system, which makes it easier for schoolchildren to access their things directly from their desks. Inside is a transparent pocket with a schedule and an internal organizer, complete with an elastic band that you can attach things to. The backpack has sturdy mesh side pockets that can hold a bottle. The body of the backpack is made from a strong waterproof material.