This 2-pack of 36" x 75' rolls of Durable Banner with DuPont Tyvek from HP is a tough material capable of withstanding up to 75 years of indoor display in demanding environments. It features a basis weight of 133 gsm and a heavy duty thickness of 11.8 mil. Also, it has an opacity of 96%, a brightness of 99%, and an ISO 11476 whiteness of 125% as well as a matte finish. Other characteristics of this paper are a moderate water resistance and a drying time of less than 4 minutes. The material will also last up to 2 years unopened. C0F12A