Madison Caribou Bike packing Waterproof Frame Bag210D pyramid nylon outershell with TPU bonded inner shell makes this bag 100% waterproof Waterproof zips and zip garage Foam liner fits into main compartment by velcro to avoid stitch holes Large compartment on right hand side for bulky items 4 mesh pockets on left hand side with key hook Ladder webbing runs the length of the top of the bag meaning strap location can be chosen to suit frame design, and more straps can be added to spread the weight