Thule Shield - The Thule Shield backpack 23L transitions seamlessly from bike to back, offering IPX4 waterproof protection and a padded laptop compartment. Features • Versatile carrying capacity — 23L convertible backpack that carries cargo comfortably on your bike or on your back • Effortless attachment — For use with the Thule InLock universal panel (not included) which attaches easily to almost any bike rack. Thule InLock universal panel purchased separately • Waterproof protection — IPX4 waterproof rating with sealed zipper, welded seams, and durable, waterproof materials • Comfortable carry — Hardware-free design makes it comfortable to carry off the bike, and the backpack straps stow easily in back pocket while riding and can be deployed effortlessly when needed • Secure laptop storage — Padded compartment protects laptops up to 16" • Enhanced visibility — Reflective trim enhances visibility from the side, front, and back when cycling • Quick-access storage — Water-resistant exterior pocket keeps essential items easy to reach • Smooth and silent ride — Soft connection of InLock system ensures a rattle-free ride Specifications • Dimensions (LxWxH): 14.0 x 7.9 x 18.1 in • Color: Black • Model name: TSIB123 • Weight: 2.2 lb • Material: 420D nylon with phthlatate-free laminate • Model number: 3205480 • Volume: 23 L • Country of origin: Indonesia