Klim Traverse, Overland and Latitude jackets are tight in the forearms if you are wearing body armor under it. I found this to be the case and this is what I wear:
If you are between sizes, say between a medium and large, then you probably won't have a problem if you go to the larger size. Even the Klim jersey is this way. I've contacted Klim about this and hopefully they make their gear bigger in the forearms. The sizing just isn't right in that regard across much of their gear.
Crashworthiness: It's good stuff. I've tested that!
I've owned the Traverse jacket and pants but have tried on all their gear. I now have the Overland jacket and pants. Had the forearms of the jacket altered for a better fit. (No, I'm not a huge bodybuilder type).
This gear is expensive. And like buying a helmet, you should try it first. Get some discount airfare and travel somewhere where you can spend a day trying on several items. Despite being made in Asia, Klim is quality stuff.