This 25 pack of 13 x 19" Hahnemuhle Matt Fibre Duo 210 Inkjet Photo Paper provides a warmtone paper with a smooth matt surface with the ability to be printed on both sides. This is a useful feature for portfolios and album creation. Additionally, it a fast drying paper with a weight of 210 gsm and a thickness of 12.6 mil for a good rigidity and consistent flatness. Also, Matt Fibre Duo 210 is acid free with a calcium carbonate buffer to avoid fading over time.