The sturdy Mardy Backpack Pannier is our highest capacity waterproof , packed full of features for bike outings and grocery shopping. It attaches/detaches to your bike in seconds with super-strong Fidlock® magnetic buckles, then converts to a comfortable backpack or shoulder tote off the bike. Featuring a separate shoe/cold storage compartment, water bottle pockets, integrated raincover, and loads of interior and exterior pockets, this backpack pannier has got you covered.