After spying the world through Costa's Tuna Alley Mossy Oak Camo Polarized Sunglasses with 580 polycarbonate lenses, nothing else compares. These bad boys feature a tough as nails nylon frame, co injected to strengthen its resistance against impact. A patented three hole venting system on each side of the frame keeps your eyes cool and prevents the lens from fogging up during intense moments of Kraken battling. Costa keeps this pair from leaping into the water with Hydrolite temple and nose pads, rubber specifically designed to keep its hold even when perspiration or salt water has the best of you. The Costa 580 technology reaches far beyond the bounds of mere polarization. By blocking yellow light at exactly 580 nanometers, the lens relieves eye strain while enhancing color, improving your overall comfort. Crystal clarity is achieved by the hindrance of shortwave, high energy blue light, cutting haze and blur like you've never seen in sunglasses. Because a long day outside usually means a hefty helping of sun exposure, Costa ensured the 580 polycarbonate lens to be 100% UV blocking and polarized, virtually eliminating reflected glare of any kind.