Conforms to EN 352-3 H=33 M=25 L=15 SNR 27 Visor Conforms to EN 1731 F. G500V5CH510-OR – fitted with 5C visor and Optime 1 ear muffs. Full adjustability, ?up/down? in 3 positions. Ajustable ratchet harness ergonomically designed with eight adjustable positioning. Also can be used with communication earmuffs, with cable channel for storage. Can be used in conjunction with 3M integrated eyewear thus providing double protection