These sunglasses are equipped with unique polarising lenses from Shark. 

While ordinary lenses merely darken the view, only polarising lenses block irritating glare. The glare-free Vision provided by Shark polarising sunglasses guarantees high optical comfort and, as a result, increased safety. The lenses also contain a highly efficient UV-filter that offers complete protection from harmful UV-rays up to 400 nanometers.

The product conforms to the EN ISO 12312-1:2013 & EN ISO 12311:2013 standard harmonised with European Directive CE89/686/EEC

Polarizing filter, category 3. Degree of polarization -99%.