double washable layer cotton anti dust mask adjustable masks

washable ear protection cotton anti dust mask adjustable masks features: design & cut material 1. many small holes, good air permeability, breathe more smoothly. 2. combining human engineering with human face design, wearing firmly and protecting better. 3. the selected mesh fabric has better air permeability and smoother breathing. 4. velvet plus cotton can better filter out particulate matter in air. 5. superior quality & comfort & safety and all the other advant...