The basecamp of layering. Streamlined baselayer with H2X-DRYÆ moisture management technology and environmentally sustainable 44% recycled polyester that wicks moisture away from the skin. The Treeline º-zip pullover features a brushed back fleece which offers superior thermal properties and excellent breathability. Chin saver provides extra, next-to-skin comfort. Certified Oeko-Tex and Sedex.