With a rectangular lens to make sure eyes are fully protected, these sunglasses are so easy to wear. Close They feature a rubber grip at the end of the arms to ensure they don't slide off your face- perfect for days spent being a bit more active. Provides maximum UVA/B protection Filter category 3- solid smoke lens Full frame Exceeds European standard BS EN ISO 12312-1, American standard ANSI Z80.3 and Australian/New Zealand standard AS/NZA 1067 80% nickel 20% polycarbonate