Tougher shell than the en397 standard requires traditional 6 point polythene harness precise fit using the unique 1 2 3 point harness depth settings meets the en 50365 class 0 10kv standard this standard is applicable to electrically insulated helmets used for working live or close to live parts on installation not exceeding 1000vac or 1500vdc extra large areas for logos on the front side and rear