USD 
Canadian
Shape: Rimless design best fits medium or large faces with round, oval or oblong shapes
Bridge: Saddle style bridge with non-slip silicone nosepads
Fit: (eye) 57, (bridge) 18, (temple) 135, 8-base curve
Finishing Treatment: Smooth metal for a sleek look
Material: Titanium alloy
Hinge: Hingeless frame with flexible wire temples
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.