Carrera Skermo Over the Glasses Goggle A high performance Carrera goggle that fits over perscription glasses...exceptional optical performance double Cylindrical lens and anti-fog features. Double polycarbonate cylindrical lens with Seal Ring system which gaurantees virtually no distortion. Silver Flash lens provides excelent light trnasmission with excelent protection in bright conditions. Anti-fog and anti-scratch treatment Helmet compatible Active ventialtion to eliminate fogging