Tribal Circle Triangle Service Symbol Black Tee Shirt. This shirt has beautifully done tribal flames with the AA Service Symbol on the front and “To Thine Own Self Be True” on the back. This unique design is made of 100% pre-shrunk heavyweight cotton. This shirt comes in sizes; small, medium, large, extra large and double extra large. This company has been making shirts and other products for almost 25 years, their product line is awesome.