Built for high-paced activities on bikes, skis, and alpine trails, the men’s Zone Long Sleeve Half Zip delivers all the benefits of merino wool with tactical ventilation. It features Icebreaker’s BodyfitZONE™ construction, which combines lighter 200gm stretch merino wool with strategically placed merino mesh panels to improve temperature regulation during active pursuits. Corespun fabrics enhance this base layer’s durability, while the deep half zipper allows for quick heat dumping once the body warms. Gusseted side panels prevent the shirt from rolling up when reaching for the next boulder, while flatlock seams help prevent chafing during longer bike rides.