Our sleeveless vest, made of 100% yak wool, is the perfect companion for outdoor activities in spring and fall, when temperatures are no longer low but not yet high enough to go without a jacket. As a sleeveless mid layer, our vest is the ideal hybrid: The medium-weight fabric and extrahigh stand-up collar reliably keep you warm around your body and neck and protect you from cold winds, while excess heat and moisture are effectively wicked away through the breathable wool and your exposed arms. These features make our sleeveless vest the ideal choice for fastpaced activities like Nordic walking or brisk ascents.