Havent be use it long but seem reasonably durable and I have some heavy stuff in there . I especially like the strap on the outside of the bag for my long crowbar and breaker bar . I would have like some extra zippered interior pocket but a couple tool roll up throw in there solve the issue for I . also if you use the shoulder strap and the bag be heavy like mine be it may be uncomfortable . what I do here be put a aftermarket car seatbelt pad on there and all be well .