• The frame has no vents, and is a non-porous frame that prevents the penetration of fine dust and splashes from outside. Many proven in preventing munition and emergency disinfection work. This best-selling model is also used in infection prevention • Impact resistant polycarbonate lenses Outer hard coat inner anti-fog lens • The frame design prevents gaps between goggles and mask when used with a mask • This model can also be worn over your own glasses • Blocks over 99.9% of harmful UV rays (less than 380nm) The frame is designed to fit the curves of your face and reduces UV rays that come in from the gaps