Glare is high intensity light 7 to 10 times brighter than normal light. Glare can cause temporary blindness, eyestrain leading to headaches, and it impairs your vision for several hours thereafter. Glare is particularly harmful to fishermen because water, even fog or rain, has natural reflective properties that enhance reflected glare. All Costa Del Mar sunglasses are polarized to eliminate glare. The remaining light falls in a narrow range of intensity allowing fishermen to enjoy viewing comfort, greater depth perception and true color contrast.
Frames are nylon, graphite, or nylon-composite.
The Hammerheads are a newer style of wrap-arounds that fit closely. The frame and side arms are designed to help prevent side and back light from leaking in and impacting your underwater vision. The lightweight graphite frame Pro Sport has also been recently redesigned. It now comes with an even wider lens than you see above, wrapping around the sides of the frame to provide a wider field of vision and to limit side light. The Laguna and Atlantic are the most stylish best sellers.