Inspired by the form and function of nature's beauty, it's no coincidence the Aleta sunglasses get their name from the Spanish word for "fin." Offering water-ready performance in a stylish yet functional design, Aleta uses lightweight Bio-Resin and double-injected Hydrolite(TM) for a better grip. And with micro shields and hooding, excess light stays out while fog stays down with vented nose pads. Wearing Aleta, you'll see the smooth shape and refined lines that don't just stop at style. They're best enjoyed when on, in and near the water. Design: Filtering reflective glare is essential for anyone on the water or outdoors. Costas absorb 100% of UV light, providing you the best in light management and protection C-Wall coating provides extra scratch-resistance and a barrier that repels water, oil and sweat for easy cleaning The lens' multipatented technology manages light by:Absorbing Harmful High-Energy Blue Light (HEV), Enhancing Reds, Greens, and Blues, Filtering Out Harsh Yellow Additional Details 6 Base Curve - Medium Coverage: Frames with medium-coverage and wrap that value style but still perform Regular Fitting: A large lens front designed to fit those with an average-sized head 580P is Polarized Polycarbonate 580G is Polarized Glass