100Pcs Disposable Respirator 3-Ply Máscara Earloop Dental Mask Dustproof. $99.97. Free shipping . layer in the middle has a filter germ of 99% or more. Plastic strip, without any metal, with vapor permeability, comfortable. Filtering effect B.F.E up to 99% *With elastic ear-loop and adaptable nose bar, soft and comfortable to wear.