Pull on the perfect balance of warmth and breathability in this lightweight, quick-drying fleece with a uniquely comfy and stretchy grid pattern. Checkerboard grooves optimize airflow, trap heat, and reduce bulk for active pursuits that start chilly, end toasted, and cover a whole lot of ground, rock, road, or snow in between. With a slim, athletic fit designed to layer comfortably under a shell, helmet, pack, or harness—or rock on its own—the AirFleece will be your new go-to midlayer across seasons, sports, and terrain.