In the Anatomica S/S Crewe, Icebreaker combined Merino wool with a synthetic fiber mix. This makes the functional shirt comfortable, even in warm temperatures and strenuous activities. The material combination improves the drying properties of the Merino wool. The T-shirt retains its natural functional properties at the same time. Merino underwear is temperature-regulating, breathable, and doesn't absorb unpleasant odors. This is ideal for multi-day sporting tours. Icebreaker gave this T-shirt a nice form-fitting cut. All of its seams are flat, and the elastic component gives it the necessary stretch. The Icebreaker Anatomica S/S Crewe is a highly-functional first layer for the entire year!