Stylish yet functional, the Earth Wood Kai Sunglasses features polarized lenses and eliminates 100% of UVA/UVB light. Lens Color: Black Triacetate Cellulose (tac) UV Protection: 100.00% Hinge Type: spring loaded Hinge Material: stainless steel Lens Width: 47mm Lens Height: 40mm Frame Width: 130mm Temple Length: 138mm Bridge Width: 23mm Anti-scratch/anti-fog multi-layer TAC polarized lenses Biodegradable 100% FDA approved moisture and water resistant