Bergen Waxed Backpack (L) Navy. Ride your bike daily in style with the Bergen Waxed Backpack. This backpack works overtime with double waterproof duty; constructed using soft martexin waxed canvas (featuring waterproof treatment) and lined in red 100% Waterproof tarpaulin Vinyl so your essentials will always stay dry. This backpack features an open pocket underneath the front flap for your pens, pencils, and calculator, and side