3M SecureFit, Protective Eyewear, SF201AF, CLEAR lens, 20ea/cs 3M Pressure Diffusion Technology allows temples to naturally adjust to individual head sizes eliminating the need to stock multiple frame sizes at worksites At a weight of less than 1 oz., provides comfortable, durable, lightweight eye protection Secure, snug fit keeps eyewear in place without slippage even when the person 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 and meet the requirements of CSA Z94.3 and ANSI Z87.1-2012