The versatile LIFA® Merino crew adapts to any type of cold weather.We combined a 100% Merino wool layer with our proven LIFA® Stay Warm Technology in a fitted 2-layer construction. LIFA® Merino Midweight Crew Base Layer delivers all the breathable warmth of Merino wool fibers, plus the unique moisture management properties of LIFA® fibers.Features:LIFA® MERINO.100% Merino wool exterior.Flat lock seams for ideal comfort and durability.2-layer construction.Non-itch fabric.ZQ wool.Composition:Shell:57% Merino Wool, 43% Polypropylene.