Icebreakers essential base layer, made from lightweight and breathable Cool-Lite fabric blend The Mens 200 featherweights ZoneKnit long sleeve crew top Icebreakers essential base layer for those cold days out on the mountain and will keep your core body temperature regulated. Made from 18.9 Merino fiber micron, this comfortable top will help to regulate body temperature and wick moisture away from the skin. This makes it an excellent first layer for all kinds of high-energy activities, whether youre skiing, snowboarding, hiking, or trail running.Icebreakers Merino Wool has a natural superfine fiber ensuring a soft touch for day-long wear. As well as supremely comfortable, Merino wool highly breathable, fast-drying, and eliminates unwanted odors for long-lasting freshness. Ergonomically targeted panels of merino mesh on the underarms help to promote airflow in these heat-sensitive areas and help regulate temperature during big days on the trail or in the mountains.For added comfort, the top features offset Raglan sleeves, gusseted underarms, thumb slits, and flatlock seams throughout which offer excellent freedom of movement motion and eliminate uncomfortable chafing and rubbing. The Icebreaker 200 ZoneKnit Merino Long Sleeve Crewe a great technical thermal top for men in cold weather activities that ethically manufactured kind to the skin.