Vans Dunville Sunglasses - Cheetah Tortoise The Dunville Sunglasses are 53% polycarbonate, 47% cupronickel retro sunglasses with 100% polycarbonate lenses and UVA/UVB 400 protection.   Composition:Frame: 53% Polycarbonate, 47% Cupronickel Lens: 100% Polycarbonate   All sunglasses in our Range are Uv400/Ce certified. Vans Dunville Sunglasses - Cheetah Tortoise