Horsefeathers Proton Photochromic Bike Sunglasses (matt Black/gray)

The horsefeathers proton sports sunglasses are designed for anyone who wants maximum performance without compromise—whether you’re heading out for cycling running hiking or just spending an active day outdoors. They combine modern design low weight and cutting-edge technologies that ensure perfect vision in all conditions. Their main advantage is high-quality photochromic lenses that automatically adapt to sunlight intensity: they darken in bright sun and lighten in lower light. Frame: high quality tr90 material silicone nose pads optics: high quality lenses 15 mm thick 100% uv protection glare-free vision clear contrast true colours measurements: bridge 17 mm temple 130 mm front width 145 mm sunlight transmission - before darkening 90% (s1) after darkening 21% (s2) includes branded hardcase with cleaning cloth.