The Crumpler Salary Sacrifice Backpack is a water-resistant 900 denier nylon shell with a 300 denier ripstop nylon lining. It has a fully padded, removable computer sleeve that can hold a laptop up to 13". It has a main compartment for books, files, folders or a small digital camera. There are interior and exterior pockets for accessories. The bag is carried by a carry handle or a backpack strap with chest strap.