Pen case spiral

A pen case with a unique spiral shape. When all the zippers are opened, it lies flat and can be used as a pen tray. Almost the entire surface is covered with a tire tube, so there is no need to worry about stains or scratches, and it will not stain when wet. The interior is made of strong synthetic leather and is easy to clean, so it can be used in a clean condition for a long time. The exterior is fitted with an original double ring for convenient fastening to a bag or other object.