This High Quantity Backpack produced by Sealock is fully waterproof, which is not only suitable for children to carry to school, but also for outdoor sports after school. This waterproof student backpack is made of the latest material similar to the feelling of clothes. TPU waterproof coating is added on the surface and the bottom, together with sealock's full waterproof zipper, to ensure that the items in the bag are dry even in the pouring rain. Children don't have to worry about when doing the outdoor sport like traveling, kayaking, paddling and rafting. At the same time, there are chest buckles at the straps, which can make the bag fixed on the body of this dry schoold backpack. The straps are not easy to fall off. The adjustable straps and chest buckles allow children of different shapes to carry comfortably. There is a large mesh bag in the front of the backpack, which can content drinking cups. There are quick buttons on the side, which can hang children's coats, towels or wet clothes. You can also hang flashlights, hats, etc. Complete functions. There is a large inner bag in the bag, which can hold iPads, mobile phones and other items for children to sort and take. The shoulder is an integrated EVA shoulder. The semi soft and hard design can support the child's back, reduce the pressure on the back when carrying heavy objects, and also bring a certain degree of comfort. Now buy this High quantity backpack to your lovely children to let them enjoy the childhood.