There s a time and a place to sweat the details. Designing the Riptide we did just that. These Smith sunglasses are a classic Italian-made style with bio-based frames. Spring hinges expand the fit at the temples. The extra flex is not only more comfortable but feels snug through runs and bike rides. These glasses come in two lens options each with glare-cutting polarization. ChromaPop+ lenses boost detail color and clarity while ChromaPop? Glass has the added benefit of high scratch resistance. The Opal Mirror Lens consist of a brown based lens boosted with ChromaPop color enhancement technology and finished with an opal mirror. Great for use in areas of medium to bright exposure this lens will enhance color and clarity and let you effortlessly see more detail. This lens is polarized to reduce glare. Provides 100% protection from harmful UVA/B/C rays.