Preschool Sizes Backpacks is made of 600D Waterproof Oxford Cloth. There are two styles to choose from: With Side Pockets and Without Side Pockets. Good idea for toddlers headed to preschool or daycare. It is applicable to the publicity activities of nursery school, educational institutions, dance classes and other interest classes. It can fit books, crayons, pencils, extra clothes, snacks and other items. Customize the backpack with your brand or logo to effectively advertise your business.