Each box contains 20 Lightweight & Comfortable KN95 face masks that contain 5 high quality layers constructed of meltdown non-woven polypropylene fabric to offer superior protection against bacteria, dust, pollen, droplets and air pollution. The elastic ear loops and adjustable nose clip allows for a secure seal, while the Medical filter material structural design and ultrasonic seamless blanking make for a staunch prevention system against bacteria and virus inhalation.