Our most popular nylon frame, this sleek, Grilamid (microcrystalline nylon) frame rides easy with excellent 8-base curve lens wrap and vertical depth for great coverage. Known for its lightweight, comfortable fit for medium to large face shapes (recommended for a hat size of approximately 7 1/4 - 7 7/8), GR4 has interchangeable lens capability and can accommodate lenses for nearly every sport.  The NXT unbreakable lenses deliver perfect light management for both the sky and turf with amazing optical glass-like clarity.  This purchase comes with a microfiber lens care bag, a durable zippered hard case with clip, and a one-year warranty.