Velo Transit Men's Quintessential 40 Waterproof Bicycle Commuter Backpack Waterproof bicycle commuter backpack Radio-Frequency welded liner creates 100% waterproof backpack The front Storm Shield tucks away when not in use and zips down when needed for rain protection or a high visibility panel in traffic Our new "Slick" Roll-top is easy to access and close, but still waterproof under extreme conditions 3-D Mesh back panel and ergonomic harness offer superior year-round comfort