The ArcOne™ Python Auto-Darkening Welding Helmet is available with ArcOne's 4000V, 5000V and 6000V Auto Darkening Filters. All filters are water and dust resistant. Each has a light shade of (4) and a variable dark shades 9-13. The Python comes standard with the Comfa-gear headgear. The new headgear has a ultra soft headband that conforms to the shape of your head. The back to front adjustment and angled front and rear allows perfect fit for any welder. These revolutionary designs come together to form the ultimate auto-darkening helmets. Style, protection and comfort, the future in welding. Control knobs are located on the other side of the helmet not pictured.