The Peltor SF401AF SecureFit Safety Glasses feature a clear anti-fog polycarbonate lens, providing excellent optical clarity and protection against impacts. These glasses incorporate 3M's Pressure Diffusion Temple Technology, which allows the temples to naturally self-adjust to an individual's head size, ensuring a secure and comfortable fit. The lightweight design and durable construction make them suitable for various industrial and outdoor applications. The SF401AF model meets ANSI Z87.1-2015 standards for impact protection and offers 99.9% UV protection.