FALKE Ergonomic Sport System's top is made from a merino wool-blend that regulates temperature to keep you warm and comfortable in even the most extreme conditions. Designed for a slim fit with a half-zip turtleneck, it's enhanced with stretch and ribbed along the sides, sleeves and shoulders to allow for a full range of movement. Though it works well as a base layer, the colorful stripes make it just as ideal for a day spent off the slopes.