An essential layer for any trail lover, Patagonia's Houdini Stash wind shell provides a highly packable and lightweight solution to taking on high-output days and changing weather conditions. Built from 100% recycled nylon ripstop for durability and weather resistance, with front and back vents to wick moisture and provide airflow to prevent over heating. Easily disappears into its own pocket when not in use. Semi-fitted with room to layer.