What Our Gearhead(R) Experts Are Saying:"This is my favorite midlayer for fast-moving missions-it's warm, light, and vents heat like a champ when I'm skinning or climbing hard. The full zip makes it super versatile in fluctuating temps."From dawn patrols to backcountry transitions, the R1 Air Jacket delivers breathable warmth built for high-output pursuits. Patagonia crafted this technical fleece with 100% recycled polyester and a jacquard zigzag texture that boosts airflow and moisture-wicking performance, keeping us dry and focused even during the toughest efforts. Designed for movement, the slim silhouette layers cleanly under a shell without restriction. The full-length zip provides adjustable venting, while a zippered chest pocket stows essentials within reach. Bluesign(R) approved and sewn in a Fair Trade Certified(TM) factory, this jacket performs in alpine environments while minimizing its impact on the planet.