A focused piece best suited as a light midlayer for fast-moving days in cooler conditions.Mammut says:For unbeatable performance and versatility, our Aenergy Light styles solve for a full range of seasons and pursuits. Combining the right touch of warmth with exceptional wicking and breathability, this ultra-light midlayer doubles as a warm base layer to see you through winter ski tours and summer hikes alike. With a snug hood that fits under a helmet and a laminated pocket to stash essentials, its the perfect choice for all who seek maximum performance at minimal weight All Mammut products purchased within the Europe come with an extended 30-month warranty period. For more details click here.Our VerdictLightweight warmth with excellent airflow and a close athletic fit. The Aenergy Light ML Hooded Jacket at 201g (Medium) delivers streamlined performance in a minimalist package. The Polartec Power Grid fleece fabric strikes a strong balance between warmth and breathability, with a textured interior that helps regulate temperature during high-output use. The athletic fit feels close but not restrictive; however, layering over bulkier garments could be limited.The hood fits neatly under a helmet or shell, and flatlock seams ensure a comfortable fit over extended wear. The bonded chest pocket is well-placed and low-profile, although storage is minimal; I found moisture built up behind this panel. This latest version features a slightly lighter build and improved sustainability, thanks to its high content of recycled polyester.- Reviewed by Ultralight Outdoor GearFeaturesPolyester content made from recycled polyesterBonded chest pocket with zipperFlatlock seamsFitted hood can be worn under a helmetSpecificationsSmall weighs: 194gMedium weighs: 201gLarge weighs: 223gXLarge weighs: 247gAthletic Fit:Material & ConstructionFace Material (B2B): 91% Polyester (recycled), 9% ElastaneRecycledbluesign PRODUCTFair WearHelp & advice:Recycled Content in Outdoor Gear

A focused piece best suited as a light midlayer for fast-moving days in cooler conditions.Mammut says:For unbeatable performance and versatility, our Aenergy Light styles solve for a full range of seasons and pur