I'm heading to Colorado for a hiking trip up one of the mountains. My gear is set except for clothing. I'm going to do the traditional 3-layer (base wicking shirt, fleece middle, and waterproof jacket). It will be late September so I have to plan for anywhere between 20 degrees and 70 degrees b/c Colorado.

So...which moisture-wicking shirts are the best? There's a lot of marketing out there. What material and percentage do I want?