Single strap bags have been around since the Ancient Egypt—maybe longer, we really have no idea. But we do know the Green Guru Billa Billboard Messenger Bag is just as functional, and it's not made from animal hides. Constructed from vinyl billboards and innertubes that would have normally ended up in a landfill, the Billa is as uniques as the design it displays. Because the Billa is made from old vinyl billboards, you can rest assured you won't see Sally or Jeff walking down the street with the same bag—because unless you're sexy twins in a gum commercial, it's just not cool. Completely waterproof with an innertube reinforced bottom, the Billa carries everything you need and secure it nicely using a buckle and hook-and-loop closure. Looks like your style just got some function.