Show your Service Pride wearing this special Officially Licensed by the United States Air Force edition shirt. Vintage Graphic with USAF Roundel Logo and Bold Text that reads: ONCE AIR FORCE ALWAYS AIR FORCE. These shirts will keep you cool and comfortable with heat pressed technology in the USA -Fabric Imported. 100% Cotton for extra comfort. A new patriotic favorite!. Officially Licensed by the United States Air Force & exclusively offered at VetFriends.