Xevo Optics is one of the first companies making goggles with a magnetic lens system. You can customize the look you want with a multitude of lens, frame and strap options. They utilize the best polycarbonate and the most durable mirror finishes possible for their lenses and even install an anti-spotting coating on them to diminish evaporation spotting. A lifetime, no questions asked return policy is the best in the industry! Check out the great article on lens selection. Use discount codes MAM for 50% off goggles and MAM75 for 75% off their sunglass line.