The Arena Cobra Core Goggle is a premium choice whether you're a club swimmer, triathlete, or open water swimmer. The innovative lenses offer an aquadynamic seal and reduced water turbulence and drag while providing UV protection and anti-fog capability. Features -Premium racing and training goggles. -Large field of view, low profile, and optimal sealing. -Split head band for solid fit on start and turn. -UV protection. -Anti-fog treatment.