When you need a base layer shirt that provides both warmth and effective moisture transfer, the Hot 6 Pack Turtleneck is the right choice. The high polyester content in the material speeds up drying and significantly increases breathabilitymaking it a great option for active winter sports where you work up a real sweat. The Hot 6 Pack Turtleneck pairs perfectly with the manufacturer's Pim Pant base layer bottoms. A good choice for skiing, freeriding, winter trekking, and winter running. - Slim fit design, narrow cut - Merino wool helps reduce odor and regulate temperature fluctuations - Machine washable: avoid using bleach and fabric softeners Like all of Scandinavian Outdoors merino wool products, this shirt is a mulesing-free product, meaning the painful mulesing method has not been used in the wool production process.