The Smartloft Hybrid Jacket fills its insulation with reprocessed scraps from Smartwool's own Classic Thermal Merino Base Layers, turning manufacturing leftovers into real, working warmth instead of letting them go to waste. A windproof, weather-resistant front panel blocks the elements where the jacket takes the most exposure, while four-way stretch paneling at the shoulders and sides keeps the fit moving instead of restricting it. A Merino wool lining rounds out the build, adding warmth against the skin without the bulk of a heavier fill. What Our Gearhead(R) Experts Are Saying:"I wear this through real cold, not just a chilly commute, and the insulation holds up exactly like I'd expect from a fresh fill, not a reprocessed one. I stopped thinking about where the material came from about five minutes in, because it just works."