Ray-Ban Sunglasses Flacko - Blue - Havana Blu Frame Brown Lenses 56-20

The 56 refers to the lens width in millimeters, and the 20 refers to the bridge width in millimeters. This indicates the size of the sunglass lenses and the space between them.

The provided product description does not specify if the brown lenses are polarized. It's recommended to check the product packaging or consult with a retailer for this detail.

The bio-based material contributes to the sustainability of the product, offering a more environmentally friendly alternative to traditional plastics.

Lens replacement services are often available through Ray-Ban or authorized opticians, though availability and cost may vary.

Brown lenses typically offer good contrast enhancement in bright light and provide protection against UV rays, making them suitable for general outdoor use.

While stylish and protective, the Flacko model is primarily designed for fashion and everyday wear. For intense sports, consider models specifically engineered for athletic performance and secure fit.

The fit may not be ideal for your face shape. Minor adjustments can sometimes be made by a professional optician, or consider trying a different Ray-Ban model with varied dimensions.

Clean the lenses gently with a microfiber cloth. For stubborn smudges, use a lens cleaning solution specifically designed for eyewear.

While made from bio-based materials for sustainability, handle with care. Avoid dropping or applying excessive pressure to the frame.