Hocosa of Switzerland "Sport" designs are intended to be Unisex and fit either men or women. Our warm Sport unisex long sleeve undershirt with a round neckline. Soft and breathable merino wool can be worn in every season. It breathes with the body, does not cause perspiration and provides warmth even when damp. Woolen underwear keeps you warm during winter and they are also good for a cool summer. Pure natural wool fibers are flexible and breathe even in warm weather. Care Instructions.