The Midori Pulp Storage Pasco Pen Case is made of a special material called "Pasco", which is a blend of recycled paper and new pulp. Although lightweight, it is thick and sturdy, and holds its shape well. This unique pen case has a charming papery texture, look, and feel, and will fit in well at school or the office. It's compact and slips easily into your backpack or briefcase. With two snaps to close, the pen case keeps all your writing instruments secure. The surface of the pen case has a water-repellant treatment, so you don't have to worry about a little rain or accidental spills!