Stylist Notes It uses an original 3-layer structure fabric developed with the motif of the US Air Force flight jacket "MA-1". The 3-layer fabric of nylon twill (surface) + polyester cotton (middle layer) + nylon taffeta (back) is very light, and the soft feel of the bonding material and the vivid rescue orange on the back are attractive. This series is full of the thorough attention of Yoshida&Co. craftsmen in all processes from cutting to sewing and parts. The back side is a vivid rescue orange. In addition, they adopted an aluminum fastener, which was rare at the time of its release, and made it so that the metal fittings such as snap buttons and saddle snap can change over time, so that the paint will peel off. Despite its compact size, it is equipped with 8 card storage and a zipper pocket, making it a great shoulder bag for travel. A removable shoulder strap is included, so it can be used as a pouch by itself, and it can also be used as a waist bag by using the loop on the back. Porter-Yoshida & Co. Shoulder Bag - Black