by kevin_t » Tue Jan 13, 2015 7:34 pm
X21 RC is less stiff and more pliable. We have not seen any problems with the X33 and it has been well used and is essentially the same type of construction, and I have inspected a few bags that have been used A LOT. That being said, it's one of things of packing light, understanding what you are using. If you have something that is highly abrasive, take a little care of put it in a sack.