This seems like it might be a good idea to protect the windshield. Have to trim it to fit from one of their stock sizes.
Racing Windshield Tear-Offs
Pro-Tint’s tear-off story begins with Plato Hoyle, the founder of Pro-Tint, Inc. For added safety, NASCAR required the teams to use Lexan®. Although Lexan is unbreakable, it will nick and pit easily, making it very difficult to clean and often creating a white haze or glare that can obscure a...
protintshop.com