What Our Gearhead(R) Experts Are Saying:"This piece is the cornerstone of my alpine layering system-light, warm, insanely breathable, and the zip neck dumps heat fast when I'm grinding uphill."When we're logging vert in unpredictable weather, the R1 Air Zip-Neck Top from Patagonia keeps us warm and dry without weighing us down. Its zigzag-textured fleece, crafted from 100% recycled polyester, wicks moisture with ease while maintaining airflow during demanding ascents. The slim fit ensures this piece never bunches under outer layers and stays sleek when worn solo on brisk days. The quarter-zip design helps regulate core temp when the sun pops or the climb steepens. We love how it layers easily under a harness or shell, and the chest pocket adds secure storage for a map or snack. Bluesign(R) approved and Fair Trade Certified(TM) sewn, the R1 Air Zip-Neck is a versatile layer that's as sustainable as it is technical.