Serengeti Velocity Sunglasses with upgraded soft silicone gel nose pads for a more comfortable fit and better nose grip. Professional Pilots who wear sunglasses most of the day prefer this modification. Most Popular Aviator Sunglasses. Velocity's lightweight titanium frame is built for speed, yet balances like a feather on the bridge of your nose. All Serengeti lenses offer the latest in photochromic technology, which constantly lightens and darkens throughout the day to ensure you see every detail. Fit: Medium to Large, Gender Unisex. SPECIFICATIONS Polarized: No, Photochromic: Yes, Lens Color: Drivers Gradient, Lens Material: Light Weight Mineral Glass, Titanium Frame (Matte Black), Base Curve: 8x, Temple Length: 130mm, Lens Size: 60 x 38mm, DBL 16mm, Fit: Medium to Large Universal Frame Features with Adjustable Silicon Gel Nose Pads and Spring Hinges.