Activated Carbon Fiber (ACF) is the 3^rd generation of activated carbon filtration technology with superior filtration efficiency. It is considered the break-through environmental protection material of the 21^st century. It has been widely used in air and water filtration and also used by the military in chemical, biological and nuclear warfare protection.

Its absorption capacity is 10 to 50 times better than active carbon power or granules. Its absorption speed is 100-1000 times faster than the active carbon power or granules as well. Only a few countries can produce this material.

ACF has extremely large specific surface area (around 17,000 ft² per gram) with micro-pores around 1-4 nanometer in diameter. That is about 1/100,000^th of the human hair.

All of these mean superior filtration efficiency. These masks are very lightweight, breathable, and comfortable to wear all throughout the day.

How to regenerate the mask

The mask can be reused through one of the following ACF regeneration processes that forces the absorbed particles to break free from ACF.

1. Sunbathe the mask under strong sunlight.
2. Boil the mask in water for 10-15 minutes. Rinse under running water for a few minutes to remove the particles. Dry and reuse. Avoid twisting or rubbing the masks with hands because that can damage the fiber structure and integrity. Use blow dryer on high heat to dry and to break free the absorbed particles.

Stop using the masks if the fibers become loose or worn.