SMITH 4D MAG S black | S3 CHROMAPOP Sun Green Mirror is the latest women's ski/snowboard goggle in Smith's magnetic goggle category. Featuring BirdsEye Vision™ (special angling at the bottom of the lens significantly expands peripheral vision, allowing you to see the snow and slope beneath you more clearly), spherical lenses that change magnetically with ChromaPop™, and all the technologies the brand offers! The Smith 4D is a goggle from the future! - Smith MAG™ for magnetic lens interchange - ChromaPop™ technology in both lenses - BirdsEye Vision™ - full integration with Smith helmets - AirEvac™ ventilation system to prevent fogging in all conditions.