90% NYLON,10% spandex New race fit 2 zipper pocket 2 Way Stretchable fabric Packs easily into your back pocket Back ventilation system our new pro wind Jacket uses our lightest-weight, most wind-resistant material for the ultimate stashable jacket. Constructed from 2-way mechanical stretch fabric for an elevated fit. With strategically placed lazer cut panels and a 2-way zip, you can dial in your airflow whether climbing mountains or ripping the descent. Ready to stash it, fold it into the internal pocket for an easy-to-stash pouch.