Flurries of snow, gusts of wind, continual sun-cloud cycles - shoulder-season weather can't make up its mind. For those who run far in unpredictable conditions, the Houdini Air Jacket strikes a balance between our more shut-down Houdini and the hard-charging Airshed. The ultralight double-weave nylon/polyester fabric (partially recycled) has outstanding breathability along with a textured interior that enhances airflow and next-to-skin comfort when you're working up a sweat. Minimalist detailing includes low-bulk cuffs and hem, single-pull adjustable hood and a zippered chest pocket that converts to a stuffsack with a reinforced carabiner clip-in loop. Reflective P-6 logo on left chest and a DWR (durable water repellent) finish.