Clean, cool air This welding helmet with supplied air cooling valve is ideal in hot, humid conditions to help ensure comfort and respiratory protection. The Fresh-Air III V-100 cooling valve allows workers to easily control the flow of clean air and lower temperatures according to preference and comes with a leather belt and adjustable holder. Personalized comfort An adjustable back ratchet mechanism and twin pads in front form to individual head shape for a customized, comfortable fit.  Welding precision The 9100-Air welding shield with XXi ADF shows great color contrast and helps protect against airborne debris so workers can concentrate on their jobs without worrying about discomfort.