I rarely write reviews but this bag may be one of the worst purchases I have ever made. The zippers fail frequently even after light use. The fastening straps do not hold secure even with lightweight items stored inside (there's nothing on the end of the strap to prevent it from detaching during riding). The bag has a tendency to slide backward and off the bike which endangers trailing riders. These bags have convinced me that I need to look to the aftermarket for an acceptable luggage solution.