By now, our love for jean jackets is no secret. They're practical, functional, and timeless, and you can wear them year-round. Whether yours is oversize or formfitting, and light wash or dark wash, a jean jacket will always be the finishing touch of your cool and effortless looks. But now that fall's entering the picture, we're finding ourselves gravitating toward dark jean jackets—they offer an elegant upgrade to any ensemble. To start getting our layering game back on track, we've rounded up 15 dark jean jacket outfits that'll inspire all your cold-weather looks.