Ideal as base layer the Ortovox M Comp Long Sleeve Zip! The comfortable, functional long-sleeve doesn't itch and wicks moisture outwards. Moreover, the fine merino fiber is odor-neutral and ensures an optimal regulation of temperature and moisture! Made in a circular knitting process, the upper part is particularly well-sealed around sensitive body zones, providing perfect insulation. Heat spots such as the armpits feature breathable and thinner material. Synthetic fibers give the baselayer and underwear special robustness. The M Long Sleeve Zip also features a zip on the collar that ensures quick ventilation after challenging climbs and speedy descents! Raglan sleeves ensure you won't be bothered by pinching seams when wearing a backpack. The M Comp Long Sleeve Zip will be your functional companion throughout the year!