The rugged-yet-refined texture of the Rockcraft Waffle Crew harkens back to the classic sweaters worn by our founder in the early days of Yosemite climbing. This is the sweater that made the first ascent on El Cap and other fabled big walls. It&';s the perfect partner for demanding adventures that require a reliable layer. 7 gauge midweight 100% merino wool that doesn&';t itch Waffle knit design provides added warmth and moisture wicking Versatile, durable, and breathable, it stays comfortable across a broad range of temperatures Responsible Wool Standard (RWS) wool, certified by Control Union cert. 895314