EGOGO New Polka Dot Style Leisure Casual School Campus Laptop Daypack Bookbag Backpack For Teenager College Girls School Bags (Blue) Material: nylon and oxford fabric. Size: 17.8"x13"x6.2"(HxLxW) Application: travel, hiking, school bag, shopping, placing laptop, ipad etc Attribute: Waterproof, durable, adjustable shoulder straps Its shoulder straps are adjustable, they are proper for most people.