Designed to be fed from a workshop air compressor and used in conjunction with the air-fed visor, the waist belt & regulator system ensures that a constant stream of air is delivered at a safe pressure. The addition of a carbon coalescing filter ensures that the air is exceptionally clean and clear of particles & contaminates that generate unpleasant odours & tastes. ¼" B.S.P. fittings means the regulator can be easily connected to an air compressor.