I used an iwom xt for 5 sits this season in my sit drag setup. While I do like the garment for warmth, it is incredibly loud against most barks (especially maple and oak). It makes a loud Velcro like sound as you try to move around the tree.
I replaced it with the first lite sanctuary system. It’s the same price but much more versatile. I wear the bibs unzipped when I walk in, and keep the jacket packed up. I climb the tree, cool off, then put the jacket on. It’s much easier than trying to work the iwom around my bridge. Equal in warmth, much more functional and deadly quiet. That’s just been my experience with the iwom.
Cheers,