Swell Vision Male Bamboo Wood Rectangular 52mm Polarized Sunglasses Composite frame Composite lens polarized Lens width: 52 millimeters Lens height: 50 Lens. Width: 52 mm Type: Polarized. Handcrafted from sustainable Acidosasa Bamboo. Waterproof and designed for lightweight comfort and floatation. The lenses are polarized and feature anti-glare and UVA/UVB protection. The frames feature spring loaded hinges for added comfort.