Polyester/cotton twill material. Reinforced elbows. Button front with flap closure. 4 large button down bellows pockets. Adjustable button tab cuff. BDU - battle dress uniform. Military fatigues shirt. Army Navy shirt. Midnite Blue - BDU shirt (polyester/cotton twill). Midnight Blue. Midnite Blue - Military BDU Shirt (Polyester/Cotton Twill).