Sharper angles, wide temples, and no-slip Hydrolite construction make the Costa Del Mar Corbina frames an instant classic. The co-molded nylon frame design offers up the perfect balance between modern style and aggressiveness, while also being extremely durable and built for outdoor environments. Integral hinges allow for easy and secure on/off access. These Corbina sunglasses feature Costa 400 Lenses, which are designed for adventure, and built to perform with superior clarity, contrast, and definition. The durable 400G lenses are made of LightWAVE glass that's 20% thinner and 22% lighter. A Green Mirror tint offers advanced visual acuity, which is perfect for fishing inshore, flats, rivers, and streams. These lenses allow a minimal 10% light transmission. Each pair of Costas features 100% polarized lenses, providing complete UVA, UVB, and UVC protection, as well as a lifetime warranty against defects in materials and workmanship.