Treeline Running Jacket – Men's

Built for cold-weather trail running and mountain training, the Treeline Jacket is our pick for athletes who need real protection without getting cooked. A windproof shell with strategic insulation guards your core, while breathable stretch panels under the arms and back vent heat when your effort climbs. The fitted hood, high collar, and thumbhole cuffs lock out drafts so you can focus on the run.

• Windproof, weather-resistant outer shell blocks cold air and wind at the core where you need it most
• Strategic lightweight insulation targets warmth without bulk — stretch panels under the arms and back dump excess heat during high-output efforts
• Fitted hood and high collar seal out icy drafts; integrated thumbhole cuffs keep sleeves anchored and add extra hand coverage
• Zippered hand pockets secure your phone, keys, or gels on the trail; reflective details keep you visible in low-light morning or evening runs
• Streamlined athletic fit layers cleanly over base layers — built for winter trail running, cold road miles, fast-hiking, and mountain training