Originally conceived in a classroom, Ivar offers a better way to design a backpack. Traditional backpacks are simply "open sacks," where all of your stuff sits at the bottom of the pack with the weight focused on your lower back. The patented Ivar shelf system offers a healthier solution for your back, delivering superior weight distribution, comfort and organization. The interior shelves evenly distribute your cargo, making your carrying experience much more ergonomic and comfortable! Everything is kept separate within the shelves for perfect organization. This accordion-like file design is also great for creating easy access. Plus, all those smaller items placed on the upper shelf won't get lost at the bottom of the pack. The Ivar Ergonomic Backpack is the Backpack Reinvented!