3M™ SecureFit™ Safety Glasses 400X Series SF401XRAS-GRN-EU, Green/Black Frame, Rugged Anti-Scratch (K), Clear Lens, comprise of a rimless lens and wide flexible temple arms for solid side protection and popular to be used in combination with Ear Muffs. Temples also feature 3M™ Pressure Diffusion Temple Technology (PDT) which allows the safety spectacle temples to naturally adjust to individuals head sizes giving wearers a secure and comfortable fit. Reduces slippage from head movements. Contoured brow guard rests comfortably against forehead and helps provide additional coverage from flying particles. Soft nose bridge for a comfortable fit. The Rugged Anti-Scratch Coating makes the lens more resistant against scratching and therefore extend the life time.