Our warmest synthetic base layer with the added boost of HeiQ tech and a slim fit. Warm, versatile, and casual, the men's Burton Midweight Base Layer Pants do all the stuff a good base layer should do with a look and feel that is comfortable on and off the mountain. HeiQ tech boosts temperature regulation and odor resistance to keep you comfortable and smelling good longer. Features: A slim fit with four-way stretch makes for easy layering and an unrestricted feel. HeiQ Smart Temp tech regulates body temperature to keep you cool through changing temps and extended efforts. HeiQ Fresh tech manages odor and the perma-stink associated with synthetic knits to keep you feeling and smelling fresh. Left side drop-in thigh pocket adds practical storage. Product meets Bluesign® approved safety and environmental standards in manufacturing.