Product details:

Short of shearing a sheep and stuffing the wool beneath your jacket, the Norrona Men's Wool Zip-Neck Top is the most direct way of staying warm with the natural benefits of merino wool. The merino wool blend is breathable, temperature regulating, and naturally combats odor-causing microbial growth, leaving the fabric smelling fresh after a long day in the hills. And since this mock-neck top has a slim fit, it fits a helluva a lot better than a bunch of loose wool shuffling around your nips.