Mammuts Womens Aenergy Light Mid-Layer Half-Zip is their lightest mid-layer is the perfect solution for ambitious mountain athletes or anyone who prizes the highest possible performance at the lowest possible weight. Made of Polartec Power Grid material, it is comfortable, stretchy, and actively sweat-wicking. Flatlock seams prevent chafing, a deep front zipper provides efficient ventilation, and a laminated sleeve pocket keeps small essentials accessible and secure. Made to accommodate all seasons and a full range of pursuits, this versatile piece is as comfortable as a mid-layer on a brisk spring hike as it is as the first layer on a winter ski tour. A sure favorite no matter what youre up to next.