Militarized Civilian Sack Coat Pattern, this pattern comes from the original coat housed at an undisclosed Museum. 4 piece body, two piece sleeve construction, with one interior slit pocket. Pattern contains photo details of stitching and construction of the original coat. Militarized Civilian Sack Coat Pattern, this pattern comes from the original coat housed at an undisclosed Museum. 4 piece body, two piece sleeve construction, with one interior slit pocket. Pattern contains photo details of stitching and construction of the original coat.