What Our Gearhead® Experts Are Saying: "This layer hits the sweet spot for high-output winter missions. The Power Grid fleece breathes incredibly well, so I never feel swampy on steep climbs, but it still traps enough warmth for exposed ridgelines. The smooth exterior makes it a dream for layering—no snagging, no bulk, just clean performance all day." We grab the Aenergy ML Half-Zip Pullover when our winter objectives demand both warmth and breathability. Built with Polartec Power Grid fleece, this layer uses its signature waffle pattern to pull moisture away from our skin the moment we start moving, keeping us dry and comfortable on long approaches and steep ascents. Its midweight feel gives us just the right amount of insulation for frosty morning missions without slowing us down. The smooth outer surface layers effortlessly under shells and insulated pieces, eliminating bulk and reducing friction when conditions call for added protection. With flat seams that prevent pressure points and an active fit that moves with us through every reach, scramble, and skintrack transition, the Aenergy ML Half-Zip Pullover quickly becomes a go-to staple for cold-weather adventures.