I have several pieces from SG to test out this year. One of the most surprising pieces is the Chinook Merino LS Crew. I have tried lots of base layers, and most suck for my use. I am a one baselayer guy for a one-day hunt or a fifteen-day hunt. I sweat a lot and I stink, anything pure synthetic is out, polygiene or not. I spend around a hundred days a year sweating into one base layer, so you learn quickly if it's going to work or not. When First Lite came out with Aerowool I didn't think I would find anything better. But I have to say I think the Chinook has all the things I love about Aerowool but seems to dry a little faster.