Made of 100% cotton Cramerton Twill cloth in the original khaki color worn by American soldiers during WWII. Cramerton was one of the original qualities used in khaki trousers during WWI and WWII. The style is based on these same classic military trousers worn by soldiers during WWII. This specific style has a Herringbone Twill Fabric, which is a reproduction of WWII Marine Corp fabric reproduced from the now defunct Dan River Mills in Virginia. Indeed a special and intrinsically unique style. It was actually made this way during WWII, but is a very rare and difficult/impossible item to find now.