This Topeak pannier bag is crafted from a highly durable waterproof material, also featuring sonically welded and sealed seems, making this the perfect bag to get you from A to B. Sporting a watertight roll-top closure, providing you with the best protection from any dust, mud, and the worst of weather. The newly designed Handle Loc system efficiently and firmly attaches the pannier bag to the rack, it is quickly released with simply a push upwards and a tug on the handle at the top of the bag.