I have an UTS ready to go so I’ll try it out in a few weeks when it’s time to move on from current system.I think I would be interested in a combination unit as well once they become more available. But I can tell you that whatever you’re imagining regarding the UTS being not breathable, you’re probably wrong. I powerlift, hike 14ers, scuba dive, and go to Barry’s Bootcamp basically daily and the thing isn’t a problem