The North Face Summit Series Pro 120 Crew now adds anti-odor technology and a 100% recycled polyester body to its DOTKNIT fabric, engineered with moisture-transfer holes that pull sweat away from the skin during cold-weather exertion. Raglan sleeves and stretch underarm gussets add mobility without adding bulk, so the slim fit layers cleanly under a shell or midlayer. We reach for this base layer on long days in the cold, when moisture management matters as much as warmth. What Our Gearhead(R) Experts Are Saying:"I wore this three days straight on a cold-weather trip and never reached for a fresh layer. It stayed dry against my skin through a sweaty skin track climb, then held warmth once I stopped moving at the summit."