Flyers (both fixed-wing and helo) jacket lightweight is on the inner tag along with its U.S. NATO number. It is made of flame-resistant NOMEX fabric. It is constructed of 2 layers of flame-resistant "cotton weight" fabric. The center front zip has a nylon pull string. It has expandable wrist and waist cuffs. The front pockets are angled and VELCRO Ìâ brand closures shut. The jacket has a small arm pocket.