With magnets at eight contact points switching lenses with the Bloc Fifty-Five Goggles is as easy as it gets, even on the move whilst wearing your goggles. This modern technology allows you to change your lens in seconds. The 8 rare earth magnets on the two dual vented cylindrical lenses that come with the Bloc Fifty-Five ensure the goggles can be quickly customised for optimal performance in almost any light conditions. With maximum UV protection and a dual adjustment strap for full helmet compatibility the Bloc Fifty-Five are a great value for money versatile snow goggle.Bloc Fifty-Five (Silver Mirror) Features:   Magnetic Interchangeable Lens System 8 Self-Locating Magnetic Connection Points 1 x Silver Mirror Cat 3 Lens 1 X All Weather Cat 2 Lens Dual Vented Cylindrical Lens Maximum UV Protection Helmet Compatible Dual Adjustment Strap Anti-Fog Lens