Icebreaker Men's ZoneKnit Merino Short Sleeve T-Shirt Geodetic Icebreaker's most breathable and lightweight tee for high-exertion activities, the ZoneKnit(TM) Short Sleeve Tee Geodetic features a clean design with mesh panels to help regulate your body temperature. The unique geometric print is inspired by the curvature of the earth. Features ZoneKnit(TM) - Body mapping technology designed to actively regulate body temperature and let skin breathe during high-intensity activity Cool-Lite(TM) - Lightweight and breathable fabric blend that manages moisture and is naturally odour resistant Eyelet mesh back and sleeves for ventilation Offset shoulder seams to prevent friction Fabric content: 60% TENCEL(TM), 40% Merino Wool Warmth system: 125 Featherweight Model measurements: Height: 185cm / 6'1". Waist: 79cm / 31". Jakob is wearing size M. Key product measurements: Back High Point Shoulder to Hem: 72.3cm (Based on Size M) Size Guide S M L XL Neck 13-14 14-15 15-16 16-17 Chest 33-36 36-39 39-42 42-45 Arm length 34 34-34.5 34.5 35