Our Medium Standard Backpack is built to last for years of durability. Whether you’re carrying textbooks or gearing up for a day in the woods, this Standard Backpack is built to last through it all. We recommend a small pack for elementary kids, medium for middle school kids, and large for higher school and college students. We designed the Medium Standard Backpack to be durable and tough enough to get your child through their school years or for their outdoor activities.