RACING GOGGLES: arena Cobra Core Swipe Mirror goggles are racing goggles equipped with mirrored lenses and state-of-the-art Swipe anti-fog technology ANTI-FOG SWIPE TECHNOLOGY: every time the lenses fog up, reactivate the anti-fog feature by rubbing the inside of the lenses five times while holding the goggles underwater. Thanks to swipe technology, the anti-fog feature lasts 10 times longer COMFORTABLE AND SAFE: swimming pool goggles adaptable to the shape of the face and nose thanks to the 5 interchangeable nose bridges; the double adjustable strap ensures a stable fit, even when starting and turning FOR COMPETITIVE SWIMMERS: these World Aquatics (FINA) approved arena racing goggles were created for competitive swimmers; they are equipped with UV-protected, hydrodynamic and low-profile mirrored lenses, which minimize water friction COMPOSITION: these women's and men's swimming goggles are made of 70% Polycarbonate, 20% Silicone, 8% Thermoplastic Elastomer, 2% Polyurethane, made without PVC MEDIUM-DARK LENSES: adult goggles equipped with medium-dark lenses, optimal for swimming in all conditions and variable or intermediate light levels