Mask valve

thingiverse

Add a valve to any mask for easier breathing. ### How to Make It Happen Follow these steps carefully: 1. Cut a thin membrane from a plastic refrigerator bag with a diameter of 26mm. Create a small hole about 2mm in diameter right in the center. 2. Choose your mask and fold it several times at the center. Carefully cut a small piece at the folded tip. 3. Insert the inner part from inside to outside, placing the membrane in its designated spot. 4. Tighten the outer part securely. 5. Make sure the membrane is flat and in place before use. A valve membrane **must be installed before using the mask**! The valve diameter should be 35mm. If you need a bigger valve, simply scale up the design in both x and y dimensions.