The Smith Guide's Choice XL ChromaPop Polarchromic Sunglasses scale up the brand's bestselling Guide's Choice frame for a larger fit without losing the wraparound coverage that made the original work on the water. The 8-base lens curvature wraps further around the face at this larger size, blocking glare from the sides as well as the front. Evolve bio-based frame material keeps the larger build light instead of bulky. What Our Gearhead(R) Experts Are Saying:"I fish through fog, glare, and full sun without switching lenses because the Polarchromic tint adjusts as the light shifts. On bright days it's dark enough to cut water glare, and on overcast mornings it lightens up so I can still read structure beneath the surface."