Most face shields will keep your face and eyes safe from mechanical, thermal and chemical injuries, but only some are designed to protect your eyes from the harmful effects of bright light as well. This range of products includes face shields with a 3.1 light transmission marking, which means that they allow from 8% to 17.8% of light to pass through the lens. Lenses with very low levels of light transmission are ideal for use in bright environments. If you have any questions or need a product recommendation, do not hesitate to contact our customer support team on 020 7501 0594 or via our Contact Us page.