Icebreaker Merino Tech Heavyweight Base Layer Long Sleeve Crew Neck Shirt, Zealand Merino Wool VERSATILE COMFORT: Featuring 100% merino wool for breathability, next-to-skin softness and odor resistance, it's perfect for both daily life & travel. Offset shoulder seams & flatlock stitching prevent chafing when youre on the go or carrying a backpack. FIRST LAYERS: With anti-chafe seams and LYCRA for added fit, the shirts, shorts, leggings, and more of our merino first layer collection is designed to keep you warm. Cover your men's thermal first layer with a lightweight pair of shorts or hiking pants. TOP TO TOE LAYERING: Our clothes transcend single usage; we make multi-functional pieces that adapt to your life & style, on the mountain, in the city & at home. From wool socks, boxers & bikini briefs, to trench coats, windbreakers & fleece hoodies. SIMPLICITY & LONGEVITY: We want our clothing to be relevant for years. Through high quality performance, Icebreaker's merino wool base layers, first layers, mid layers, and outer layers will thrive in your wardrobe and your activities for many seasons. PREMIUM LAYERING: Try Icebreaker's merino wool under-base, base, mid, and top layers if you've used similar products from Woolrich, SmartWool, Marmot, Columbia, Carhartt, Hatley, The North Face, Helly Hansen, Levis, Ben Sherman, Browning, or Mack Weldon.