Nike hightide mirror swimming goggles the nike hightide mirror swimming goggles feature optically polished polycarbonate lenses with anti fog coating the mirror lenses make them suitable for outdoor use and help glare reduction the adjustable silicone split strap sits around the back of the head to ensure a secure fit and ensure they remain in place whilst swimming swimming goggles polished polycarbonate lenses with anti fog coating mirrored coating suitable for outdoor use