The base needs to be right. There is nothing more unpleasant than damp, clinging undergarments irritating your skin. It doesnt matter how good the rest of your equipment is if you feel uncomfortable in your base layer. Luckily, Mammuts 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.