This Basecamp anti-fog mask will prevent you from inhaling dust and other harmful particles while you engage in outdoor activities. The filter pieces found here include activated carbon and N99 Silica gel. The activated carbon core found inside the mask can be detached easily. The unique ventilated design with the double air valve allows you to breathe easily. It is very convenient to wear, and you can adjust the mask according to your size. It is available in plain blue, red and black colors but also comes in other attractive designs. Undeniably, this is the most practical solution to breathe fresh air!