Legendary Hellcat Men's G-1 Leather Flight Jacket w/Side EntryThe Legendary Hellcat is the US Navy G 1 style flight jacket as worn by the Blue Angels Flight Demonstration Team for over a decade 3. 0 oz (1. 2mm) seal brown cowhide, heavier than most commercially available G 1 jackets, with a non removable genuine mouton fur collar. The Hellcats cowhide weight and construction follows the current US Navy contract material standard. USN perforated on the front fly panel. Bi swing back for full arm range of motion.