Our Vapor fabric is the lightest fabric in our American-made Merino Wool layers product offering. Lightweight, thermoregulating, moisture-wicking, quick-drying, soft, itch-free, and odor-free. Our women’s lightweight, warm-weather wool layers made with Vapor include wool underwear, wool t-shirts, wool crew neck long sleeves, and wool sun hoodies. Lightweight wool socks on the list? The Vapor Athletic Sock and Vapor Ankle Sock have your feet feeling cool and covered.⁣