Whether you are carrying textbooks or enough gear for a day in the woods, our Standard Backpack Bag is built for years of dependable service. We recommend the small for elementary kids, medium for middle school, and large for high school and college students. Popular as a book bag but durable enough for any wilderness adventure, our Backpack Bag collection is designed to provide years of use in a style that only gets better with age. Our Standard, Deluxe, Serengeti and Laptop designs are available in a variety of sizes, colors, and materials to match whatever your lifestyle may be. The zippers we use in our bags, designed and built by YKK, are the absolute best and are designed to excel in outdoor environments where mud, sand, and rain can play havoc on moving parts.