USD 
Canadian
Shape: Best fits medium or large faces with round, oval or heart/triangle shapes
Bridge: Fixed with embedded rubber nosepads
Fit: (eye) 61, (bridge) 12, (temple) 127, 8-base curve
Finishing Treatment: High-gloss or matte finish
Material: High-grade nylon frame is lightweight and durable
Hinge: Anti-corrosive spring that provides flexibility offering a secure, comfortable fit for various face shapes and sizes
Neutral Grey:
Bright, direct sunPerfect for especially bright, direct sunlight. Offers rich color and contrast along with the highest available light reduction, unlike ordinary grey lenses that flatten light evenly across the spectrum.