When the mission calls for efficiency, we bring the Mammut Aenergy Light ML Hooded Jacket. Whether we're skinning uphill before sunrise or logging high-mileage trails under the summer sun, this ultra-light midlayer adapts to our pace and the season. It delivers just the right amount of warmth while staying breathable through big efforts, and it works equally well as a standalone piece or under a shell. Crafted from recycled polyester, it offers quick-drying performance with a soft, flexible feel. The flatlock seams reduce chafing under harness or pack straps, while the fitted hood slides effortlessly under a helmet. A bonded zippered chest pocket secures the essentials without bulk. From alpine climbs to cool-weather runs, this is a layer we trust when every ounce—and every move—counts.