USD 
Canadian
Shape: A modified square with wider temples to fit larger heads.
Bridge: Saddle style, fixed bridge with embedded nose pads.
Fit: A modified square with wider temples to fit larger heads.
Finish: Saddle style, fixed bridge with embedded nose pads.
Material: High-grade nylon, which proves to be lightweight and extremely durable
Hinge: Saddle style, fixed bridge with embedded nose pads.
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.