Clear marine grade PVC film is very flexible and durable. It has been specifically developed for outdoor use as windows, whether on dry land, near water or on watercraft. This PVC film can be sewn through but it is also tough enough to stand up to heavy use. The PVC compound used to make the marine grade film includes low temperature resistance, mildew inhibitors, and UV stabilizers that provide added layers of protection in direct sunlight. This material meets ASTM-D-882 & ASTM-D-1004 respectively.