Staying warm and dry when you're on the move through wet and cold environments can be next to impossible unless you're wearing the Icebreaker Men's Shak Classic Full-Zip Top. Made with 100% merino wool sourced from New Zealand, the Shak naturally regulates body temperature, wicks moisture, and resists odor-causing microbial growth, making it a great midlayer whether you're skiing, backcountry touring, or hiking during the colder months of the year.