The Traditional has a classic, vintage style. It features breathable, wire mesh side shields and a molded nose bridge. It has a base curve of 6, which is less than most safety eyewear. The Traditional protects from harmful UV-A, UV-B, and UV-C rays. Traditional Features: Classic, vintage style Breathable, wire mesh side shields Molded nose bridge 6 Base curvature 100% UVA, UVB, and UVC protection 3.0 IR Filter Lens: Commonly used in outdoor applications Offers protection from excessive glare Provides 99% protection from harmful UV-A and UV-B rays 100% polycarbonate lenses Measurements: Temple Length: 110 mm Temple Width: 140 mm Lens Height: 46 mm Ideal for Small to Medium faces Compliance: ANSI Z87.1-2010 *NOTE - Welding Safety Glasses and Goggles using Shade 5 filters or lighter are not intended for arc welding, which requires a darker lens found in Welding Helmets (OSHA's 29 CFR 1910.252 lists the minimum lens shade requirements for a variety of welding operations). Welding protection with IR Green shades, Cobalt, or other very dark lenses is NOT to be worn while operating moving vehicles, bicycles or any such apparatus, particularly on the road, as these shades can significantly impair one's ability to see traffic signals adequately or accurately. "Welding protection" includes, but is not limited to: glasses, goggles, shields, masks, hoods and helmets. Safety Glasses USA, Inc. is not responsible for any damage or injury caused by such activity.