It uses an original three-layer structure fabric developed with the motif of the US Air Force flight jacket "MA-1". The three-layer fabric, nylon twill (surface) + polyester cotton (middle layer) + nylon taffeta (back), is very light, and the soft feel of the bonded material and the vivid rescue orange on the back are attractive. This series is packed with the thorough attention to detail of Yoshida Kaban's craftsmen in every process from cutting to sewing and parts. It is a backpack recommended for daily use. It is large enough to store A4 size documents, and the zipper on the side of the main body allows direct access to the main storage compartment, so you can put in and take out your luggage without opening the flap. The two front pockets are wide and have a gusset, making this an item with high storage capacity and functionality.