Icebreaker 260 Zone LS Half Zip Long Sleeve Merino wool top brand new with tags and in box Jet Heather Black color size medium, slim fit base layer for warmth Lycra content for stretch and mobility Zoned body mapping technology for optimal thermal regulation Zip neck collar for temperature regulation Strategically placed merino mesh for ventilation Flatlock seams prevent chafing Raglan sleeve construction for mobility Underarm gusset for comfort and mobility Dropped front and back hem for added coverage Icebreaker heat transfer logo Comfort, odour resistant, breathable, warm, move with you Fabric Details Body: 97% Merino wool, 3% Lycra Panels: 100% Merino wool Eyelet: 98% Merino wool, 1% Lycra, 1% Nylon