The all-new Men's Merino 200 Oasis Long Sleeve Crewe from Icebreaker is the ultimate thermal base layer for winter. Crafted from 100% Merino wool, this top is soft, lightweight, naturally odour resistant, and keeps you warm yet remains breathable. It features gusseted underarms to aid mobility and offset shoulder seams to help reduce friction, making it ideal for winter activities such as hiking and skiing. Our versatile, go-anywhere shirt made from breathable 100% merino wool jersey, the 200 Oasis Long Sleeve Crewe is our best-selling base layer top.