The choice is simple. Either own an obscene number of goggles so you're ready for any light condition or take advantage of the interchangeable lens design of the proven™ mx google and the proven™ otg mx goggle. Just remember the age-old maxim:adapt, survive and conquer. Especially the last part. These lenses are engineered with the comfort of venting and the performance of anti-fog treatment. Multiple color options are available and each one offers the uv filtering and impact protection of durable, scratch-resistant lexan®. Choose the color that fits the environment and give your eyes the best possible range of vision. When light changes, you'll be able to keep up with the sun and surpass the competition. Important note: use care when installing/removing accessory lenses. Scratched lenses can not be returned and are not covered under oakley’s warranty policy.