How effective are gas masks? – AnswersToAll
How do you make a working gas mask? Cut Off the Bottom of the 2-Liter Bottle. At the bottom of the bottle, you'll find a seam. Cut a U-Shape on the Side of the Bottle. Remove Bands From Dust Mask. Place Dust Mask Inside the Bottom of the U. Duct Tape Mask to Bottle. Duct Tape the Edges of Your Mask. Thread Bands Through Slits and Tie Off ...