Banjo Brothers Waterproof Backpack Pannier: BlackBanjo Brothers Waterproof Backpack Pannier: Black. A versatile roll top waterproof pannier that easily and quickly converts to a backpack. Two layer design with ballistic outer layer and welded seam liner that is fully replaceable Outer flap hides backpack strap when being used as a pannier and hides rack hardware when being used a backpack Zippered pocket on outer flap and bag has two additional side pockets Reflective piping and striping Places for