Eshops Cool School Backpacks for Boys Book Bags for Kids Material: dacron Structure: 1 x main layer, 1 x subordinate layer, 1 x front layer, 1 x outer zipper pouch, 1 x inner zipper bag, 2 x outer mesh pocket Adjustable padded shoulder straps Dimensions: 12.1" L x 18.7" H x 7.8" W For the crowd: students in elementary school, middle school, high school, college