Originally designed for hard-working urban bike messengers, the Timbuk2 Classic Messenger Bag features a durable and iconic construction that has become an everyday, all-purpose bag for bikers, student, and working stiffs alike. Store your small items in the internal organizer pockets, and keep your books, documents, or packages safe and dry in the waterproof, vinyl-lined main compartment. The quick-adjust cam buckle and buckled cross strap (not available on XS) secure the bag whether youre riding through traffic or sprinting to catch the train. Reflective tails keep you visible when dodging angry commuters in large SUVs. The Covert option features a large reflective center panel for increased visibility.