The Waterlock II backpack by Nixon is made from 600D polyester and tarpaulin. This pack features a large volume main compartment with cinch and dual snap buckle, a padded side entry laptop compartment and two side zipper storage pockets. It also features a nylon wetsuit change mat closure, padded shoulder straps, and adjustable skate straps. The measurements are: 19.3 x 12 x 7.5 inches (28L).