Rio 12 oz. Opaque Ultra-Smooth Matte can be used for printing on one or two sides. With an ultra-smooth finish, this product is compatible with screen printing, digital printing, and pressure-sensitive lettering. It is intended for both indoor displays and outdoor displays for short-term usage (1 year or less). Its opaque barrier helps to eliminate image show-through. Additionally, this product has been engineered to be fire retardant.