Each has 2 valves and comes with 4 FREE replaceable activated carbon filters.

Sturdy adjustable velcro fastener holds mask in place. Can be worn neck when not needed.

4 Replaceable Activated Carbon Filters
Resistant against droplets and dust
Built-in breathing valve to limit fogging of eyewear
Nasal bridge piece for better fixture around nose and added protection
Attractive and modern look
Additional filters available
Dimensions 5,5 inches by 11.5 inches as indicated in photo.
 One size fits most average sized faces.
These Masks Offer more protection than single layer cotton or fabric face masks.
 Our 5 Layer Carbon Filter is protective and filters out many Allergens, Dust and Pollutants.
They are Washable, Reusable and Comfortable fit that fits most Adult faces.
Design is Stylish for Men and Woman to be used at Work, Sports, Indoor and Outdoor Settings.
Used for General Adult Population. Breathable and Comfortable .

Size: One size fits most faces Velcro to adjust size, stretches a bit to fit different faces
Material: Neoprene, Carbon filters