Icebreaker Long Sleeve Sprint Zip - Men's:  The Sprint Half Zip from our Technical Base Layers range comes in lightweight 200gm merino and has a touch of LYCRA® for fit. Designed to give you the edge in performance sports, this base layer has a zip neck collar to guard against the wind, raglan sleeves with gussets for freedom of movement, and flatlock stitching to prevent chafing. The fit is trim and athletic.