A few months ago I got a SO backpack in X21. A few days ago, a SO separate bag arrived in X33. I have not had a lot of experience with the X21 and none with the X33 although I’m fortunate enough to see, touch, and handle both of them.
The X33 is very light but has a thicker, rougher feel to it. For my pruposes, it doesn’t handle as nicely as the X21 which is softer and more pliant. I expect the X33 is more durable than the X21.
I’m looking at getting a large bag from SO…one that is 6,300ci. I can’t think of a good reason not to order it in X21 given the climate and type of hiking I do. Where I go it is wet and thickly vegetated and, while I am on trail some of the time, I also do a lot of off-trail work.
Is there any reason to get the X33 or X42 rather than the lighter X21?

