9100- a new platform for the entire line of 3M's protective welding equipment. Ergonomidesign has transformed 20 years of experience and user insights from the welding industry into the ideal shield. 9100 offers outstanding protection, comfort and performance. It changes how the welder wears the shield and experiences its fit, stability and balance. Adjustment possibilities have increased by 200%. A new pivot location minimizes leverage forces. Eastern and Western ergonomics are included in the patented headband to avoid pressure on nerves, arteries and acupressure points. The new auto darkening glass radically improves eye protection.