Gifted my son the Crowbar MX Sand goggles rather than the regular Crowbar MX. They fogged badly in his first race. Motosport was not very helpful, so contacted Oakley directly. They think the lens did not have proper de-fog treatment, so they said they would replace the lens. My son thinks the problem is the denser foam, since his friends' MX goggles do not fog. He will be trying the new lens soon. Will followup on this review.