Airhole

Multiple layers of fabric means less chance that respiratory particles can pass through the mask. Thicker, denser fabrics do a better job than thinner, loosely woven or knit fabrics. Trying to blow out a candle can illustrate how respiratory particles...

Multiple layers of fabric means less chance that respiratory particles can pass through the mask. Thicker, denser fabrics do a better job than thinner, loosely woven or knit fabrics. Trying to blow out a candle can illustrate how respiratory particles...

Multiple layers of fabric means less chance that respiratory particles can pass through the mask. Thicker, denser fabrics do a better job than thinner, loosely woven or knit fabrics.Trying to blow out a candle can illustrate how respiratory particles can...