OPTREL® Welding Helmets Respond ten times faster than industry standards require. All helmets are dust and water resistant. These helmets offer outside adjustability and telescoping headgear. OPTREL® has a 2 year limited warranty and is available in the following; Mira Plus black or red, Twisty black or red, OSC black, blue, green, silver and pink. Various Selectable fixed, selectable, and adjustable shades. Leather protectors, hardhat adapters also available.