This helmet is designed for welders who they need one of their hands to be free during and from beginning of welding process, when welder wants fix two or more work piece and starts welding; or when welder needs to see welding area right before beginning of welding.
In this helmet there is a gap in front of welders eyes which he can see through this gap.
after fixing work pieces together and adjusting start point of arc welding; simply he needs to tilt his head downward and starts welding