This two-strap pack is modeled after our 253 Courier: it features a sturdy CORDURA™ shell, waterproof lining and pockets inside and out. Outside, large front bellows pockets (one with a pen/pencil holder) and a mesh side pocket provide extra storage. A webbing loop on the other side will catch your U-Lock or anything attached to a carabiner. Inside, a rear envelope and front zippered pocket will keep your things safe and dry. Adjustable shoulder straps and sternum clips keep your things close and comfortable.  The computer insert for this pack narrows at the bottom. Measure your laptop before ordering a Roadrunner with a computer insert.