20 Pieces/50 Pieces Disposable Blue Mask To Prevent Dust From Entering 3 Layers Of Breathable Filter Protection Disposable Mask, Hypoallergenic, Breathable Fabric, Comfortable Fit, With Elastic Earrings, 3 Layers Of Breathable Comfort, With Elastic Ear Hanging, Suitable For Home And Office Safety, To Block Dust And Air Pollution