Cockpit USA U.S.A.F. 21st. Century A-2 Jacket - BlackThe Cockpit USA 21st Century A 2 in Black is the current specification A 2 built by an authorized US Department of Defense contractor 2. 75 oz (1. 1mm) chrome tanned goatskin in black, with an updated fit that adds room through the chest for true to size ordering. The same construction improvements as the brown USAF version: hidden side entry pockets along the patch pocket seams, twin interior chest pockets, double pen pocket, and vented underarm