The base needs to be right. There is nothing more unpleasant than damp, clinging undergarments irritating your skin. It doesn?t matter how good the rest of your equipment is if you feel uncomfortable in your base layer. Luckily, our Eiger Extreme Collection includes the Moench Advanced ML Half Zip Longsleeve Women. The combination of very lightweight Polartec® Power Dry® and highly elastic Polartec® Power Stretch materials keeps you cozy and warm and fits like a second skin. The chin protector on the high-cut collar avoids chafing. And, to allow you to slip your favorite longsleeve on again the next day, the Moench Advanced ML Half Zip Longsleeve Women has an antimicrobial treatment. Which means: it stays fresh for longer.FEATURES: UV protection (UPF)UPF 30+. Material blend consisting of super-lightweight Polartec® Power Dry® and highly elastic Polartec® Power Stretch® for an optimum warmth-to-weight ratio and excellent freedom of movement.Soft inner layer in an exclusive Eiger Extreme look ensures excellent moisture management and short drying time. Antimicrobial treatment prevents unpleasant odors Mammut® Vertical Motion TechnologyTM for optimized ergonomics during alpine movement sequences. High collar with optimum neck protection.High-quality flat chinguard and zipper underlay Functional "underarm gusset" for optimum freedom of movement. Elastic sections under arms with flat thumb loops to stay in place when sleeves are pulled up.MATERIAL & TECHNOLOGY: Main material: 100% Polyester. Insert: 66% Polyamide, 24% Polyester, 10% Spandex.