1. Generally, there is an elastic band inside the helmet, which can directly adjust the length of the elastic band to make the glass cover stuck.

Pay attention to fixing after adjustment to prevent the glass cover from falling off. Welding mask is a tool to protect workers' safety in welding and cutting operations. It is a high-tech product integrating optics, electronics, ergonomics and materials science. It uses a combination of high-quality LCD and coated glass as a shading lens. The light sensing system on the lens can instantly detect the generation and disappearance of arc light in the welding process, and quickly drive the liquid crystal to shade and change color, so as to realize safe and effective filtering of harmful light, thus protecting the welder's eyes and face from arc radiation. The welding mask consists of observation window, optical filter, protective sheet and mask.