M's R1 Air Zip Neck - 40246 - Treeline Green Size:S Center-front zipper has an interior

Center-front zipper has an interior storm flap and zipper garage at chin for next-to-skin comfort

Model height: 6'2"

but there's a 100% guarantee it won't

When the sun comes out

warm-to-touch backer fabric eliminates the need for a liner

M's R1 Air Zip Neck - 40246 - Treeline Green Size:S Center-front zipper has an interiorEngineered for active pursuits, the M's R1 Air Zip Neck delivers lightweight warmth without bulk. The breathable fabric wicks moisture and regulates temperature across changing conditions, making it ideal for layering under jackets or wearing solo during moderate activity. The half zip design offers quick ventilation control, while the fitted cut ensures freedom of movement. Perfect for trail running, climbing, or everyday performance wear.