Bertoni Sports Photochromic Sunglasses for Cycling Running Ski by Italy - F996A Frame: flexible anticrash Grilamid (nylon) with memory of position. Color: mat titanium grey Lens: photochromic from very light brown to dark with antifog coating - only 8 sec. to become darker Nosepad: adjustable - special removable tips for helmets Weight: 19 grames - drop ball certificated - Suggested sport: all sports