Eco-friendly lightweight super strong polyester canvas and smooth zippers. 1 main pocket with a built-in large patch pocket to classify and distinguish your items. Suitable for your books, clothes, snacks, purse, pencil case, purse, textbook, notebook. A mesh pocket on each side holds a bottle and umbrella. 12.5"(L)x5.5"(W)x16.5"(H)/32cm(L )x14cm(W)x42cm(H). This backpack can be used as school bag, kids school bag, laptop bag, shopping bag , hiking bags, leisure travel bags, backpacks, etc. Lightweight, perfect for school, college, work, weekend getaway, travel, hiking, camping, trekking, biking, and other outdoor activities, etc. Good choice for birthday, Christmas, back to school gift for students, Valentine's Day, gift giving.