Simple and high performance, the Icebreaker men's merino wool long sleeve Oasis Crewe Bodyfit active base layer is a natural base layer selection that also offers sun protection (UPF 50+) when you wear it by itself. The lightweight Icebreaker Merino wool has ultra fine fibers so it feels soft and won't itch, and it resists static electricity build up so it won't cling. This material is perfect for keeping New Zealand high mountain sheep comfortable and happy, insulating to warm them in the winter, and breathing and wicking to cool them in the summer. Icebreaker's merino wool works like this for you too. Because Icebreaker merino wool resists odor naturally, you can wear it for days or even weeks without washing it - and when you get around to it, it's easy care: machine wash cool and line dry. Design details on the menÆs Icebreaker Oasis Crewe include raglan sleeves and forward side seams to prevent chafing, gussets for flexible mobility, flat sewn seams for next to skin comfort, and seamless underarms.