It is not recommended to manufacture simple gas masks at home by yourself, because this may not achieve effective protection, and it may also bring safety risks due to improper materials or production process problems. The design and manufacture of gas masks require professional knowledge and materials and processes that meet relevant standards to ensure reliable filtration and protection of various toxic and hazardous substances. If you need to protect the toxic and harmful environment, you should choose to purchase qualified gas mask products that meet national standards from formal channels to ensure your own safety. Self-made simple equipment cannot guarantee protective performance and may cause serious health risks.