Simply put, wool is great! Surly's 100% Merino Wool Jeresy keeps you cool when the temps climb, and it's warm in cold weather even when wet. And, because wool is antimicrobial and wicks fantastically, it doesn't stink. And that's good for everyone. The classic accoutrements are all there, too: embroidered logos, a full-length zipper and a zippered kangaroo rear pocket that's accessible from both sides.