These square-shaped aviator sunglasses are the ultimate class act, with sleek silver metal frames and silver smoke mirrored lenses that offer superior UV400 sun protection. Knockaround Mount Evans frames are made to stand up to the rigors of life, whether you're an urban city dweller or explorer of faraway lands. Polarized lenses keep away the glare when you're on a bike, boat, unicycle, or the back of a camel. Look sharp no matter where life takes you.