This overshirt is modeled after the CPO shirt that had been worn by Navy Chief Petty officers until sometime after WWII.
While the original ones were made with heavy wool, we made it with lighter fabric made of brushed flannels that still can be worn on hot scorching days and chilly nights.
It also features double hand pockets that serve the functions for a hand warmer or carriers of your everyday goods.
Also keep an eye on those cat-eye buttons as the humble purveyors of the old times used them back in the days.