Timbuk2 Classic Messenger Bag Our Classic Messenger Bag with massive functional upgrades. Durable ballistic nylon exterior. Waterproof TPU liner. New memory-adjust True Fit cam buckle eliminates daily fit adjustments. Just unclick the cam, put the bag over your shoulder, and lock the cam back in for a perfect fit every time. New three-zip front organizer with color coordinated zippers - Black, gray, and Black - to help you remember what goes where. New internal slash pocket against the back wall of the bag provides a padded, firm place for you to store files, iPad, Kindle, or e-reader.