The Aenergy Half Zip Pullover from Mammut is a classic close fitting first or mid-layer designed for mountaineering and ski touring all year round. It is made from medium-weight Polartec Power Grid material, which keeps you warm, has plenty of stretch and has a waffle structure on the inside that efficiently transfers moisture outwards and keeps warm air trapped. The Mammut Aenergy Half Zip’s smooth outer material means effortless layering and good ventilation options are provided by the deep half zip. Mammut Aenergy ML Half Zip Pull Features: Polartec Power Grid Fleece 100% recycled polyester Lightweight Stretchy and Quick Drying Flatlock seams prevent unpleasant friction Half-zip stand-up collar Weight Approx 230g