Bark And Mill Messenger Backpack | TanThe Bark And Mill Messenger Backpack. Style never goes out of fashion. This classic design is simply one of our favorites. Hand crafted in our leather and canvas workshop with 3. 5mm thick vegetable tanned leather and antique brass hardware. Hand stitched with waxed cotton thread using the traditional saddle stitch ensuring a lifetime's use. The Messenger features two shoulder straps with two shoulder pads to be worn as a backpack, that also converts