3M Speedglas Welding Helmet SL has a narrow design that’s 25 % lighter than any other Speedglas model. Our welding helmet is suitable for quick welding tasks with a motion sensor that automatically turns on the Auto-Darkening Lens when you pick up the helmet.Get lightweight eye and face protection for a range of welding applications, with 3M Speedglas Welding Helmet SL. Even with the Auto-Darkening Lens included, it still weighs a total of just 370 g – that’s 25 % lighter than any other 3M Speedglas model. Narrow helmet design is ideal for tight spaces. Grab and Go: A motion sensor auto-matically turns ON the welding lens when you pick up the helmet. Appropriate for most arc welding processes, such as MMA, MIG/MAG, TIG, and plasma welding.