One-piece cover, wide field of view and excellent visibility, anti-fog coating, quality Silicone Face Seal Comfortable Fit, anti high impact, Eye ProtectionScratch resistant eyepiece design (Gap)Patented buckle design, easy and quick replacementSpeech Diaphragm design to keep communicate easyFive-point headband to keep stableInternation connector, can connect with breathing apparatusCE Schedule. ANSI.Z87 LA approval