50 PCS Breathing Valve Replacement, Air Breathing Filter Accessories

Feature: 1. Compatible with majority of Dust veil available in the market. 2. Replacement Valve, disposable supplies cannot be washed. Recommend replacement of 1~2 times a day. 3.Suitable for sports, running , active carbon Facial protection cover , etc.. Please note that the package don't include the veil. 4. Active carbon filters isolate 95 percent of fine particles and protect them against pollution, pollen, dust, allergens, debris, etc.