The Carrera Kimerik S Goggle has the unique air system. The vents do not allow air to flow directly into your eyes and therefore avoiding dryness or tearing that results from improper airflow within the goggle cavity. Carrera lenses provide 100% UVA and UVB protection, safeguarding the eyes against harmful ultraviolet radiation. The lenses feature high surface hardness and material strength and have been successfully tested by top athletes in extreme-sport situations as well as meet or exceed the American and European standards for impact and scratch resistance.