Comfort and style are both critical factors leading the frameless design in these safety glasses. They are engineered to offer mechanical strength and personal protection in the workplace. They also help to offer 180° distortion-free viewing.Antifog–Engineered in compliance with international standard EN 166 option N to resist fogging for a minimum of 8 seconds at 100°C.Scratch-Resistant–Resists surface damage by fine particles in compliance with international standard EN 166 option K, which requires light diffusion after abrasion to be less than 5 candelas per m².Hydrophobic–Designed to resist water and dirty marks in humid environments.ESP–Helps to reduce dazzle and the harmful affects of blue light.