Arcteryx says about the Sigma AR Pant Men's
The Sigma AR Pant utilizes composite material mapping to enhance performance during cold weather conditions when climbing on rock, alpine and ice. Durable Burly Double Weave to reinforces high wear areas and 4-way stretch Wee Burly™ Double Weave in the body gives full range of mobility. The Trim fit and tapered lower leg minimizes loose fabric and articulation enables full range of motion and a drawcord at the cuff seals out updrafts and debris.