I did a search and found a couple mentions of the Uniqlo Heattech base layers. We have a friend involved with figure skating and she swears by the stuff.
I assume it is polyester using their proprietary yarns. They claim it warms as it absorbs perspiration and it conforms better to body shape and movement. It has anti-odor properties as well. Sounds like just the stuff for hikers.
Does anyone have experience with these products? I'm curious about comparative weights, etc.
They make a full line of tops and bottoms for men, women and children. Men's tops and bottoms are ~$20 each on the company website, which seems very reasonable.
http://www.uniqlo.com/us/mens-clothing/collections/mens-heattech-collection

