The material is light and water resistant. The main compartment has a large zippered opening, which makes it easy to use. It has two side pockets and a front zipped pocket, perfect for storing small things that you always need to have on hand. It has a zipped back pocket and a padded back that prevents the contents of the backpack from hurting your back. Our backpacks also have adjustable padded straps, for more comfortable use of the backpack.