With a bold butterfly shape, the Fiona is confident and fun up front while being sinewy and curvy in all the right places. Built from virtually indestructible Grilamid® and featuring the detail- and mood-boosting Happy Lens™, the Fiona features smooth 3-barrel hinges, 6-base polycarbonate ARC® lenses, and 100% UV protection.Happy Lens™ enhances color and contrast, increases clarity, and improves mood and alertness6-base polycarbonate ARC® lenses for increased optical performanceSmooth 3-barrel hinges100% UV protection reduces eye fatigue and long-term sun damageFrame measures 63-13-130