Built for the outdoors. Koko Head is a classic round frame with a keyhole bridge and flexible hinges for a secure and comfortable fit. This style features SuperThin Glass lenses for uncompromising visual quality and optimal scratch resistance. Details All Maui Jim sunglasses feature PolarizedPlus2(R) lens technology that goes beyond shielding your eyes from glare and harmful UV rays by enhancing colors to reveal the true beauty of the world around you. Fit & Design: Exclusive PolarizedPlus2(R) lens technology