A unique 2-in-1 base layer, the Men's Helly Hansen Lifa Merino Midweight Crew Baselayer has a flattering crew neck and long sleeves. Crafted from a warm-breathable 100% merino wool exterior and a 100% LIFA® moisture wicking interior. The versatile LIFA® Merino crew adapts to any type of cold weather. This fitted 2-layer construction is designed with a regular fit, down insulation, a very lightweight and heavy-duty durability, this base layer is a must have in your winter wardrobe.