Koko Head is crafted with a rounded frame and keyhole bridge reminiscent to fashion styles of the past, designed for smaller face shapes. Its frame is built of lightweight injected nylon with rubber tip temples, and complemented by embedded rubber nose pads and hidden spring hinges creating a comfortable yet unmovable fit. Koko Head ignites a hint of vintage charm in a fashionable yet high-performance sunglass. FRAME FEATURES: Material • Lightweight nylon frame with rubber tip temples Fit • Complements oval, oblong or square face shapes • Best fits smaller face sizes • Unisex appeal Lens Gradient: Bi-Gradient Bridge & Hinge Designs • Saddle-style bridge with embedded rubber nose pads • Hidden spring hinge Style Category: Classic LENS FEATURES: ST Glass SuperThin (ST) Glass provides the absolute best optics available. 20% thinner and lighter than standard glass, it offers the best scratch and solvent resistance. FINISHING TREATMENTS & OTHER QUALITIES: • Enhances color, contrast and clarity for beautiful views and stunning protection from glare and 100% of harmful UVA, UVB and UVC rays • Waterproof and oleophobic coating sheds water & snow and repels grease & smudges.