The men's platinum II base layer pant is engineered with ColdPruf dual-layer insulation system that traps warm air between layers. The interior material is ColdPruf proprietary ColdPruf technical fiber performance polyester and the exterior is a ColdPruf technical fiber performance polyester/Merino wool blend that delivers superior moisture management, rapid drying and warmth. Silvadur Intelligent freshness antimicrobial technology provides durable, long lasting odor control on the fabric. The pants feature a comfort waistband, a darted fly and a wide back GUSSET that follow a man's natural shape and ensure the pants stays in place no matter the activity. The Crew features a dropped tail and comfort ribbed cuffs and both the top and bottoms have flat seams and a tagless design to prevent chaffing.