Waterproof panniers (pair) with roll-top closure have a maximum carry load of 19.8 lbs. (9kg) Lightweight, sturdy polyurethane-coated ripstop nylon fabric stands up to weather and abuse; material is PVC-free QL2.1 system works on racks up to 16 mm in diameter, and offers an additional mounting hook for extra security Top QL hooks and lower sliding hook adjust without requiring any tools Mounting the panniers to your lowrider bike rack allows you to maintain a low center of gravity and off-road agility despite your extra gear Symmetrical shape allows use on either side so you don't have to remember which is left and which is right Highly reflective 3M™ Scotchlite™ reflectors aid visibility.