Elvex equips these Safety Glasses with a black frame and copper-colored blue blocker lenses. These lenses reduce visible light transmission by up to 50%. Helium 20 Safety Glasses weigh in at only 20 grams. Elvex equips these glasses with extended polycarbonate lenses and their ErgoFit temples. A clear SuperCoat coating results in a washable anti-fog, anti-scratch, and anti-static finish. Studies suggest that excess blue light can lead to disruptions in sleep patterns and even macular degeneration. Elvex's blue blocker lenses block this harmful light from reaching your eyes. These glasses are ideal for people that work outside and those that work on computers or tablets throughout the day. Blue blocker lenses also increase contrast, increasing visual clarity. Elvex designed their Helium 20 Safety Glasses with comfort in mind. These glasses fit broader facial profiles and offer extended lens coverage. Elvex's ErgoFit Temples fit the contour of your head for a comfortable, secure, non-slip fit. These glasses absorb 99.9% of harmful UV rays. Want a different color or style? Check out our complete selection of Elvex Helium 20 Safety Glasses.