Designed from the ground up for the next generation of Costa water explorers, Schoolie celebrates iconic Costa design proportions and time-tested performance features to meet the functional needs of the youngest water explorers. Schoolie features an 8 base wrap, specifically tuned for younger heads, that provides coverage and protection from the elements. Double injected hydrolite across the frame aids in comfort & retention, allowing consumers to better focus on the task at hand. Retainer ready temple tips allow users to affix any retainer of their choice to ensure their frames aren't lost while exploring.? 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 8 Base Curve Decentered - Max Coverage: Frames with maximum-coverage and wrap that help reduce light leak Narrow Fitting: A small lens front designed to fit those with a slightly narrow head 580P is Polarized Polycarbonate 580G is Polarized Glass