I'm all about the Cocona fabric now, most breathable stuff I've ever owned. Not sure if other companies are using it (cocona) but Homeschool Airbreather II is what I use for a base layer now and I swear by it. Warm but keeps me totally dry, super odor resistant too. It's not a true compression fit like UA, more like a snug long sleeve shirt. WhiskeyMilitia has it from time to time, but is almost always on Dogfunk, BC, etc.