This 13" x 33' roll of Somerset Enhanced Velvet 255 from Moab combines an archival 100% cotton paper with a velvet textured matte surface that is durable for everyday handling. It features a heavy basis Weight of 255 gsm as well as a thickness of 18 mil. Also, it has a rated opacity of 96% and whiteness of 97%. Additionally, it is both acid free and calcium carbonate buffered for longevity.