Such goals as climbing Denali or spend 50 days on your skis this year involve a lot of time spent in your thermal underwear. For such endeavors you might as well be as nice as possible, starting with the unbeatable next-to-skin comfort of the Ibex Boys's Woolies Zip T-Neck. Consisting of soft, itch-free merino wool, this performance base layer also contributes a natural ability to fight odor, stretch without permanently losing shape, and move moisture and breathe in such a way that it not only insulates effectively, it also feels nice as you heat up. The Ibex Boys's Woolies Zip T-Neck has a 9 inch zipper that's great for venting when you're ferrying loads on a glacier climb. Likewise, when zipped to the top of the t-neck, it offers a warm layer of Safe guardion later in the day as you huddle around your camping stove. The Ibex Woolies Zip T-Neck for men is also machine washable, demonstrating that, in addition to its itch-free feel, performance wool garments of today have moved way beyond the woolies of old.