Trek Adventure Boss Full Frame Bag Large (3.8L) Black

A durable, carry-everything full frame pack that installs quickly to let you adventure farther.

1. Available in four sizes to best fit more frames and adventures
2. Mount with thumb screws (sold separately) to bikes with integrated boss mounts
3. Large main pocket and smaller compartment pocket make it easy to stay organized
4. Gold lining and internal mesh pockets make finding your gear a cinch
5. Water-resistant construction helps keep your gear dry
6. Durable materials and robust zippers are designed to last
7. Easy-to-use attachment straps are included for mounting on most bikes
8. For sizing, simply measure the internal dimensions of your frame's triangle and match to the closest size bag