Featuring crystal clear PolyGlass Pocket Sheets, the Art ProFolio Advantage sports a fresh contemporary look for the ultimate understatement in presentation and storage. Using a special polypropylene material, they incorporate a rigid, yet lightweight black poly cover for added durability with easy-to-carry mobility. The simple muted-texture cover features a multi-fold spine that allows it to lay completely flat. The 24 PolyGlass sheets, which allow for up to 48 inserts, are fastened solidly to the cover with metal rivets. Acid-and PVC-free with European-sourced acid-free mounting paper.