Both bags feature top loading so contents can't spill out when opened and they will self close in the wind if forgotten. We mold the bags close around the fender rails and in tight to the fender. This allows the bags to carry weight in close where it won't upset your balance. This design also keeps a narrower profile for less width to worry about when lane splitting. Our design team shaped these bags to work with your stock exhaust system, but they will work equally well with any system that has a profile lower than the stock pipe.