Arena Cyclone Mirror ACS Goggle are a great pair of open water or triathlob goggles. The have one of the best suctions available on the goggle market and have really proven them selves to be a top notch goggle! They have an anti-fog coating on the inner part of the lens. They also have an UV shield making it great to swim outdoors. The mirror coating reduces and glare that comes off the water, protecting your eyes from those harmful rays.