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alright so i finally saved up and went out to buy an avalung b/c it seems like they are almost must have b/c tool. Looking at these videos about using the avalung http://www.youtube.com/watch?v=2JdfixypnT8
it seems like the avalung packs make a noise when u breathe into them, I DID NOT buy the avalung pack, just the seperate avalung sling.
My question is: Is the avalung sling supposed to make that noise when breathing as well? Mine isn't and im wondering if it is a defective product
