The Air Flow Shirt keeps you feeling cool on the hottest days with its open knit Air Flow mesh. Patagonia's redesigned Air Flow Shirt works as hard as a running shirt should, keeping stride and wicking through high-output endeavors. It now uses extremely breathable and fast-drying Air Flow mesh (100% polyester) throughout, delivering a featherweight 15-UPF top with Polygiene® permanent odor control. Pared-down details include a self-fabric crewneck that won't bind, minimal seam construction for unencumbered mobility, and a small envelope pocket on the right hip hem. With colored reflective logos on the chest and center back. Details: locker loop; no itchy tags. 3.2-oz 100% recycled polyester Air Flow mesh with 15-UPF sun protection and Polygiene® permanent odor control. Fabric is bluesign® approved Scramble Kolob Canyons, run the Tuolumne high country, explore Sedona.