The Yukon is a 400 g/m2 Crew Neck designed to keep in body heat and be super comfortable as a base layer. The fine micron 100% Australian Merino Wool garments will rapidly wick away moisture during periods of high activity while preventing heat loss during inactive times. This piece is designed to be one of the warmest layering tops you will find. Whether you're wielding an ice axe on a near-vertical ice sheet or taking the dog for a walk on a cold afternoon this garment will perform to your satisfaction.  This merino wool crew for men will quickly become the favorite go-to shirt. Use as a base layer on chilly mornings or wear it all by itself all year.  Soft and versatile, so many uses for this shirt.  AND did we mention?  NO STINK