The shirt jacket, or shacket, is ideal as a cool-weather outer layer and as a mid-layer in a warmer ensemble. Many servicemen learned this via the USMC HBT P44 Jacket, which Alpha Industries used as the basis for their P44 Mod Shirt Jacket. Made from 100% cotton, it’s both warm and breathable and oozes military style with a versatile standard cut, fold-down collar, and button-down front. One exterior chest patch pocket and two more chest-entry pockets provide storage, while the adjustable cuffs help keep the wind out on breezy fall days.