Icebreaker 260 Tech L/S Crewe Merino base layer Men (M, blue) - The Icebreaker 260 Tech LS Crewe is perfect for skiing, ski touring, mountaineering or hill walking in the wintertime. In fact, this long-sleeved shirt is so versatile that you can rock it every day as well. As for the material, the shirt is made of pure merino wool, which is naturally odour-resistant and temperature and moisture-regulating. So, physical activity of varying intensities are perfect for this base layer. The flatlock seams will prevent any unpleasant chafing. The offset shoulder seams serve to prevent chafing when you're wearing a backpack, while the offset side seams add to the overall comfort of the shirt. A great base layer for the cold - the Icebreaker 260 Tech LS Crewe.