West folio Type G Expandable Folio's are strong and durable lightweight and acid-free art portfolios with a 200 sheet capacity. West folios keep artwork flat and protected while providing a wide choice of colors and a 30mm expanding gusset. This A1 size West folio is provided in Opaline. Made from Polypropylene with a 30mm expanding gusset. Lightweight & acid-free. Keeps artwork flat and protected.