package List: 5pcs X Face Mask, And 10 Breathing ValvesDescription:Package:5 Pcs Unisex Black Protect Sport Mask With With 10 Pcs Exhaust Breathing Valves Replacement Dust. High-quality Materials:The Reusable Face Mask Is 11.3% More Breathable, Strengthens The Ability Of Air Circulation, Dissipates Heat, Also Reduces Moisture Inside To Ensure Smooth Breathing With Our Breathable Face Mask. Meanwhile, Its Elasticity Is 6.1% Higher For Wearing More Comfortable.avoid Glasses Fogging: Enlarged One-way Valves Are 26.3% More Efficient In Exhausting Of Heat, Water Vapor, Etc, Which Decrease Humidity And Keep Filters' Property.application: The Activated Carbon Filter Is Replaceable After Time Of Usage, T And The Sports Mask Shell And Valves Can Be Detachable To Wash By Hand When Get Dirty.