Advanced double lens protection with TMC™ technology to offer fog-free use, even in extreme environments. Acetate inner lens and polycarbonate outer lens. Anti-mist and anti-scratch protection. Low profile design = be worn with an industrial safety helmet or bumpcap. Wide 30mm elastic headband for improved comfort and a secure fit. Conforms to EN166 1.B.T.3.4.9.K.N and EN170.