Parweld XR940A Powered Air Purifying Respirator (PAPR) welding helmet complete with face seal, head gear & air duct. The lightweight, compact design enables the user to wear this comfortably for long periods of time. The electronic control system maintains the calibrated airflow at the pre-set level. This system is very easy to maintain as the battery and filter can be changed in seconds by hand. Portable and lightweight Constant filtered air flow Extra large viewing area.