With its stylish nylon stitching and value price, the Art Profolio Evolution from Itoya is perfect for art, photo and poster storage! Each book features a durable polypropylene cover; crystal-clear, top-loading pocket sheets that resist moisture and dust; and quality crafted, thick-gauge, acid-neutral black mounting paper. The Art Profolio Evolution is completely acid-free and archival safe with 24 pocket sleeves for 48 views. Available in 12 sizes.