I've had same bag for 10 years and have not replaced anything on it. I've rolled my bag over curbs, checked it into the back of crj's, and rolled it through slush mixed with type IV fluid on the way to the aircraft. The brand is Pathfinder. 5-10 years ago I saw many pilots with the same bag. I may be the only one left still using this durable bag, have not seen another one in a while.