* The Standard HDPE frame uses slot adapters compatible with any MSA slotted helmets (included with each frame) and a wide choice of V-Gard visors* Works with or without ear defenders- adaptors stow away when using ear defenders resulting in no more lost parts* Conforms to EN 166 (When worn with appropriate visor)- 3 = Liquids- 8 = Resistance to short circuit electric arc- 9 Non adherence of molten metals and resistance to penetration of hot solids- B = Medium Energy Impact (120 m/s)- T = Impact resistance at extreme of temperatures (-5/+55°C)* Conforms to EN 1731 (When worn with appropriate visor)- F =Low Energy Impact (45m/s)