An air filter may include a synthetic foam filter region, and a natural fiber filter media region, having pileous, absorbent, wickable natural fibers. The foam filter region and the
Also, various studies reveal the deep penetration capability of the particles ranging below 400 nm into the human body causing damage to different organs (Heyder, 2004; Maher et al., 2016; Wick et al., 2010). On the top, adversity and the loss bought in by COVID-19 have enlightened ...