The most commonly used material is a heavy weight vinyl known as PVC (polyvinyl chloride).
The weights of the different banner substrates range from as light as 9 ounces per square yard (310 g/m2) to as heavy as 22 oz/sq yd (750 g/m2), and may be double- or single-sided.
Grommets (eyelets) can also be added in order to facilitate hanging of the banner.
Most banners are now digitally printed on large format inkjet printers which are capable of printing a full color outdoor billboard on a single piece of material.
A quality vinyl banner will also use an outside hem to ensure that grommets are secured properly.