What Our Gearhead® Experts Are Saying: "This jacket has become my go-to for cold-weather training runs and shoulder-season hikes. The Primaloft insulation is impressively warm without bulk, and the ClimateSync laser cuts actually work—you can feel the airflow pick up when you start moving hard. Plus, the Polartec fleece panels are soft and breathable."We pull on the Salomon Mountain Flex Hybrid Jacket when frosty mornings and variable conditions demand versatile performance. Engineered with Primaloft Gold CrossCore insulation, this hybrid layer traps heat without weighing us down, while the Polartec 200 fleece panels deliver breathable warmth and a soft next-to-skin feel. ClimateSync Technology uses laser-cut vents that open dynamically as we pick up the pace, releasing excess heat before it builds up. Two-way stretch fabric and articulated sleeves move naturally, so we can stride, scramble, or power hike without restriction. Reflective details boost visibility in low light, and multiple secure pockets keep essentials within easy reach. Whether we’re heading out before dawn or squeezing in miles after sunset, the Mountain Flex Hybrid Jacket keeps us warm, dry, and ready for more.