Dual use with classic arms or with wide elastic band. Detachable foam offers additional protection against shocks and dust. Non-magnetic – nickel and ferrous free. Excellent ventilation through indirect vents in the back foam. Anti-scratch + Anti-Fog coating. 99% UV protection. CE certified. Standards : EN 166 1 FT, EN 170 2C-1.2, EN 172 5-3.1, ANSI/ISEA Z87 +, ANSI/ISEA Z87 + U6 L3.