Designed for cross country skiing, but also great for other cold weather aerobic sports, the Swix Star XC Jacket is a windproof warm-up and training jacket made with the lightest microfiber on the market. It features an eco-friendly durable water repellant coating and a wicking mesh lining to keep you dry. Plus, the mesh lining is made with nylon and woven with carbon (from burned bamboo wood) which makes it anti-microbial and odor resistant. For increased mobility, side, elbow, underarm and back stretch panels and pre-shaped sleeves allow generous arm movement and "laser cut" perforated underarm ventilation offers constant air flow. As a safety feature for those who like to get out in the early morning or around dusk, reflective details increase visibility in the dark.