While making a simple gas mask at home can save money, please note that this homemade mask may not provide professional protection. Here are some materials and steps to make a simple gas mask for reference: ### Materials: 1. **Mask or gauze**: You can use ordinary medical masks, cloth masks or multiple layers of gauze. 2. **Activated carbon**: You can buy activated carbon granules or powder, which can absorb some harmful substances. 3. **Plastic bottle**: A clean plastic beverage bottle (such as a mineral water bottle). 4. **Rubber bands or ropes**: Used to fix the mask. 5. **Scissors**: Used to cut materials. 6. **Tape**: Used for fixing and reinforcement. ### Production steps: 1. **Prepare the mask**: If using a cloth mask, make sure it is clean and suitable for wearing. You can also fold the gauze into multiple layers to increase the filtering effect. 2. **Activated carbon filling**: If using a plastic bottle, cut the bottle and fill some activated carbon in the upper half (the top hat part). When harmful gases pass through the activated carbon, they will be adsorbed. 3. **Connect the material**: Fix the mask or gauze to the opening of the bottle, making sure it fits tightly to prevent gas from entering from the edges. 4. **Form a fixing strap**: Use a rubber band or rope to fix the mask to the head to ensure stability and comfort when wearing. 5. **Test the seal**: When wearing it, make sure the mask fits tightly to the face. When you inhale gently, the mask should have a suction feeling, proving that the seal is good. ### Notes: - This homemade mask has limited protection and cannot replace professional gas masks. - In environments with toxic gases or serious pollution, professional protective equipment should still be used as a priority. - Replace the activated carbon regularly to maintain the filtering effect. - Make sure to pay attention to safety when using and storing protective equipment. I hope the above information is helpful to you! Once again, please give priority to the safety and reliability of professional protective equipment.