Optrel is a Swiss maker of welding helmets, in business since 1986. The brand specialises in auto darkening filters with a light rest state and in natural colour rendering, which makes it easier to set up a part before striking the arc.
The range holds Panoramaxx with a wide field of view, Crystal with a light filter state, the e6xx series for workshop work, and Swiss Air powered systems for work in fumes.
When buying a helmet look at the shade range, the filter switching time and the optical class in the 1/1/1/1 marking, and for low current TIG at the lower sensitivity limit, because cheap filters lose the arc below 10 amperes. Check the weight as well if you work all day.
For helmets of this brand we keep outer and inner lenses, sweatbands and headbands, so a worn part is replaced without buying a new helmet. With powered air systems watch the replacement intervals of the particle filter.