U.S. WWII USMC P44 HBT Fatigue Cap- Size 7 1/4 US, 58 cm Size 7 1/4 US, 58 cm. 100% Cotton HBT (Herringbone Twill) Construction. Copied from an original WWII cap in the IMA collection. Black EGA professionally applied and heat cured. Real Marines refer to this as a "cover". High quality and very comfortable.