CHPO Siri Glasses - Photochromic - Black / Clear to Black

The Siri glasses were named after Siri Tolander, a legend among bicycle couriers in Stockholm. They are perfect for outdoor activities. Features of the CHPO Siri sunglasses Design: Unisex Shape of glasses: Medium Dimensions: 57mm / 20mm / 150mm Protection: UV400 Lens technology Photochrom Can't decide whether you need a clear or a dark lens? Then photochromic lenses are the answer for you! Just like Rap Metal, they are a two-in-one solution. Sunglasses and clear glasses in one frame. In other words, perfect for hiking, cycling and snowboarding. They automatically adapt to changing light conditions and offer you clear vision and protection from UV rays.