This is the "TANKER" series, which is synonymous with PORTER and was announced in 1983. It uses an original 3-layer fabric developed with the motif of the US Air Force flight jacket "MA-1". The 3-layer fabric of nylon twill (front) + polyester cotton (middle layer) + nylon taffeta (back) is very light, and the soft feel of the bonded material and the bright rescue orange on the back are attractive. This series is filled with the meticulous attention to detail of Yoshida bag craftsmen in every step of the process, from cutting to sewing and parts. It comes in three colors: black, sage green, and iron blue, and the back is a bright rescue orange. In addition, aluminum zippers, which were rare at the time of the product's release, are used, and the paint on metal fittings such as snap buttons and eggplant rings is purposely made to peel off so that they will show signs of aging as they are used. A tote bag that can store A4 size documents, perfect for daily use. Although it has a simple design, it is functional with two distinctive front pockets, a zipper pocket and a clear pocket inside. The long handle is long enough to be worn over the shoulder.