Completely acid-free and PH-neutral through their polypropylene, PVC-free construction and quality-crafted, acid-free black mounting paper, these presentation books are archival safe for a variety of art storage needs. They are great for photographs and digital images. Their top-loading, clear polypropylene sheets will not stick to copier toner and are ideal for storing artwork and memory projects. The durable polypropylene cover resists moisture and dust and features stylish nylon stitching. Each ProFolio contains 24 pockets for 48 pages.