Filter is the leading provider of Class 3 safety shirts. Our shirts are made from high-visibility materials that meet or exceed the standards set by the American National Standards Institute (ANSI). Our shirts are available in a variety of sizes and colors, and we can also customize them with your company logo or other graphics. Class 3 safety shirts are required for workers who are exposed to traffic speeds of 50 miles per hour or more. is your one-stop shop for all of your Class 3 safety shirt needs. Contact us today to order your shirts or to get more information about our products and services.