It is light and easy to use, and the length of the belt for attachment can be adjusted with a dial, and the size is large. (The size of the head will be decked as it covers the hat.) The fatal defect is that the dark side shade material is acrylic! This is not good. It's the worst. Because, when working at a high temperature in front of you, the acrylic deformed like a candy, drooping, it solidified in a strange way as it was. He warmed up again on the gas stove and fixed it somehow but the distortion remained. I wanted to make it all from polycarbonate.