Crumpler Local Identity (L) Backpack for 15 inch Laptop, Beech/Black/Orange Expandable Main Compartment: The Local Identity's main compartment can shrink when the Haven is in place and expand to full volume when it's not Doubly Secure: The bag's roll-top opening and two side openings each feature a combination of clasp and zipper closures Fully Adjustable Ergonomic Harness: The large Local Identity's harness system is wide, flexible and padded. Its fully adjustable chest and shoulder straps combine to distribute weight evenly across your body Perspiration Control: The rear of the bag and underside of its harness both feature Air Mesh padding Extreme Water Resistance: All Crumpler photo bags are water resistant, but with its waterproof roll-top opening, YKK water resistant zippers and waterproof TPU tarpaulin front panel, the Local Identity will keep your gear bone dry in even the most extreme wet weather conditions