Product detailsWide-angle mirror design, comes with one-piece silicone earplugs Lens - Polycarbonate (PC) ;Eye mask - silicone (SILICONE); Mirror strap - silicone PerformanceAnti-fog, comfortable and elastic silicone, soft, suitable for sensitive skin for peopleSuitable for boys and girls aged 3-14 UV PROTECTION AND ANTI FOGhe inner surface of our kids swimming goggles for boys and girls lens has been treated with anti-fogging, so it will not produce fog when used in water for a long time, making clearer vision; the lens also uses anti-UV processing, which has the effect of anti-UV rays, which could protect your kids from heat and damage of the sunlight.(NOTE: Do not touch the lenses inside surface by hands or any sharp tools, or it will damage the lenses, damage fog function.)