The "PORTER FORCE" series is a military-inspired series inspired by the accidental differences in fabric colors found in military items.

The most distinctive feature of this series is the subtle difference in color between the fabric of the front pocket and the fabric of the main body of the bag, which makes it look as if different lots of fabric are used. Military wear and bags rarely have products with color differences in one part of the fabric, and this series was produced because of the interesting irregular color scheme that was created by chance.

The outer fabric is made of 210-denier 6-nylon strong yarn woven for industrial materials. This fabric is originally used as a base fabric for rubber boats, which are not intended to be dyed. However, by daring to dye this fabric, the unique luster and rugged impression of the vertical stripes are expressed to give it a more military look.