A little brother to Costas Rincon frame, Rinconcito blends West Coast style lines and edgy curved temples. This medium style, named for the iconic Southern California right point break, features bio-resin construction, polarized 100% UV Protection Lens, integral spring hinges, and Hydrolite nose and temple pads. The Costa sunglasses fit guide is a range from Narrow, Regular to Wide with most people choosing Regular. Fit is a combination of both the size of the sunglasses and the features of the frame, together. The features of our sunglasses influence the way the sunglasses fit, like the hinges and temple construction. Use the fit guide to select a Costa sunglass frame that will be comfortable and perform for you. 580P polycarbonate Lens are lightweight and impact-resistant. These are the most durable lens material options available.