Free Shipping & Easy Returns! Explore Maui Jim Maluhia-643 Prescription Sunglasses now. Maui Jim Maluhia-643 is a Progressive Eligible frame for Men and Women, which is made of Nylon.Nylon is a thermoplastic material that is blended in order to counteract its initial brittleness. Nylon blends are lightweight, stable, and resistant to breakage. Nylon has less of a tendency to "bleed" it's plasticizers resulting in great hypoallergenic properties. It can be blended with polyamides,grilamid, or trogamid. Maui Jim Maluhia-643 RXSunglasses come with a cleaning cloth and protective carrying case.About Maui Jim Eyewear Maui Jim has led the eyewear industry by design and innovation since 1980, offering eyes everywhere superior protection from the harmful rays of the sun in its popular line of sunglasses. From iconic shades with patented technologies, to readers perfect for sunny-day pastimes, to the impressively stylish and comfortable daily-wear frames in the Optical line, Maui Jim creates men’s and women’s performance eyewear for any scenario. 100% Authentic Maui JimFramesDirect.com is an authorized Maui Jim dealer, selling only 100% authentic Maui Jim prescription sunglasses frames and lenses. Polarized with an anti-reflective coating, Maui Jim lenses reveal the vibrant colors of the world while protecting your eyes from the effects of the sun's harsh glare and harmful rays. Satisfaction guaranteed. Maui Jim Lens Comparison Chart (PDF)