Product descriptionBloc says - The Daytona sunglasses from BLOC are the ideal partner for demanding activities, they are engineered to enhance performance and provide total protection.  The distortion free, polarised impact resistant XTR Karbon8 optical class one lenses provide maximum protection against UVA, UVB and other harmful light up to 400nm. Tested to BS EN ISO 12312-1:201. The non-slip hypoallergenic temple tips are designed for comfort and fit. With enhancing sports hinge, no matter what activities you are doing your vision will not let you down. Bloc Daytona Sunglasses Black