This mask is handmade, it has a double layer of fabric with an inner lining of hydrophobic, waterproof non-woven fabric, an antibacterial and antifungal technosanitary fabric with a filtering of more than 96% of particles. It also has a pocket between the two fabrics to put an additional filter if desired. It is reusable since it is washable at high temperatures (it does not support iron). It has very soft and comfortable rubber bands that you can adjust both around your head and behind the ears.