After trying this product I have to say I was disappointed .While it looked lightweight and comfortable, it did not provide the protection I needed in an industrial and scientific setting. The lack of a frame meant that debris could easily enter from the sides, and the fit was NOT tight enough to keep out dust and particles. The only pro was that it was indeed lightweight, but that was not enough to outweigh the cons. I would not recommend this product for anyone working in hazardous environments..