The Mammut Base ML Crew Neck is built from organic cotton with a brushed fleece back, giving it a soft, warm feel against the skin without any technical bulk. Elastane in the ribbed cuffs and hem keeps them snug wear after wear instead of stretching loose. A relaxed fit and a small ski-tourer graphic on the chest give it an easy, everyday layer with just enough outdoor character to wear well past the trailhead.