Porter Rubber Paint 2WAY Briefcase Business Bag [Porter] (B4 Compatible) 325-04043

This is a vertical 2-way briefcase from the "RUBBER PAINT" series, which combines a rough canvas fabric with a waterproof zipper and is painted with a special rubber resin that has a matte texture after sewing.You can enjoy the attractive contrast between the canvas fabric, leather, and rubber textures, creating a style that combines work style and outdoor activities. There are zip pockets on both sides of the back of the bag that are convenient for storing small items that are frequently taken out.On the inside, there are zip pockets and open pockets, making it suitable for storing small items such as memo pads and calculators.The main storage compartment has a thin gusset and is sized to fit B4 size documents. Rubber resin is carefully applied to the stitches and seams by hand, and then heated at 150 degrees Celsius to penetrate into the gaps between the fibers and fix it. This reduces the intrusion of water droplets from the seams. The back of the main fabric is treated with PVC, so you can use it without worrying about changes in weather. Furthermore, it has been treated with a storm treatment developed by Cotton.inc, an organization of the USA Ministry of International Trade and Industry, to make it water repellent. In addition to increasing the elasticity, it also stabilizes the coating on the rubber resin part and smoothes skin irritation.