3M Pressure Diffusion Technology allows temples to naturally adjust to individual head sizes, eliminating the need to stock multiple frame sizes at worksites. Secure, snug fit keeps eyewear in place without slippage even when the wearer is in motion. Anti-fog coating helps keep lenses free of moisture in hot and humid conditions. Polycarbonate lenses absorb 99.9% UVA and UVB up to 380 nm.