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: 2-layer construction 100% Merino wool exterior Flat lock seams for ideal comfort and durability Non-itch fabric Composition Shell: 57% Merino Wool, 43% Polypropylene. Machine wash in luke warm water - 40?C very gentle cycle,Do not bleach,Do not tumble dry,Do not iron,Do not dry clean Use wool detergent,Do not use fabric softener,Wash inside out,Do not wring. Helly Hansen Lifa Merino Midweight Crew Women's Navy