The engineering and design of the Smith Frontier/Green Sol-X Mirror adult winter sports goggles provide full eye protection and improved visibility, rain or shine! Designed for medium fit, those alpine ski and snowboard goggles feature a Carbonic-X cylindrical lens with a ventilation system, an anti-fog treatment and a non-slip adjustable strap that will be sure to please ski enthusiasts this season! Also, those alpine ski and snowboard goggles feature a VLT (Visible Light Transfer) rating of 12%, promoting a good performance on bright, cloudless days.