Free Shipping. Maui Jim Bamboo Forest Polarized Sunglasses FEATURES of the Maui Jim Bamboo Forest Polarized Sunglasses The Bamboo Forest sunglasses feature Maui Jim's special MauiPure lenses which filter, balance, and increase the amount and quality of the colors that the eye naturally perceives. Bamboo Forest glasses have full frame flexibility due to their super tough grilamid construction. Grilamid is a rugged, resilient material used for making frames that is specifically formulated for flex, impact strength and dimensional stability. As a result of the lenses on the Bamboo Forest, you see deep, saturated colors that have a higher level of contrast and depth perception like you've never seen. These glasses have a waterproof coating to shed water and snow. They also have an oleophobic cooating which repels grease and makes smudges and fingerprints easier to wipe away on both the front and back of the lenses. The Bamboo Forest Polarized Sunglasses have MauiGradient, which is a darker application at the top that gradually gets lighter moving down the lens so the appropriate amount of light is allowed to filter through certain areas, while less filters through in places where protection is paramount.