( 3M Speedglas Air Welding Helmet with Adflo Powered Air Purifying Respirator! ) The reason I like it so much is because your not breathing in the fumes from the welding. When I used to be a smoker I didn’t really care about the fumes. But then I quit smoking and I noticed that a lot of phlegm would build up in my lungs, and I would spit it out! As soon as I started using the 3M Adflo PAPR… ALL GONE! Completely clear! It is a ten! Ten out of ten, mate! Thank you! No worries!