The Icebreaker 300 Merino Fine Polar Long Sleeve Half Zip for men features a stand-up collar that can be half-opened for ventilation and is characterized by a particularly fine merino wool quality with a fiber thickness of only 15.5 microns, which is exceptionally smooth and feels extremely soft on the skin. This extra soft "fillet wool" is reliably scratch-free, even for very sensitive skin. The 300g/m² thick fabric provides substantial thermal performance even in sub-zero temperatures and yet prevents rapid overheating during changing activity levels. Ergonomically guided flat seams and a pre-shaped cut with raglan sleeve construction prevent chafing and offer great freedom of movement.
Made from 100% merino wool from responsible sheep farming (mulesing-free), this Icebreaker underwear is odor-resistant and temperature-regulating. It is a sustainable natural product because no microplastics enter the wastewater during washing. Learn more about the benefits of merino underwear in a detailed comparison of merino vs. synthetic fibers.
Material: 100% Wool (Merino Wool)
Material thickness: 300g/m²
Fit: Icebreaker Bodyfit
Special features: Superfine 15.5 micron luxury merino wool, ergonomic seam placement, zippered stand-up collar, thumb loops








