3m 6000 series reusable half mask respirator Product information Lightweight and comfortable, this low maintenance design eliminates the need to carry spares, with the low cost face piece simply being replaced if damaged. Used with twin lightweight filters (these are not included with this mask), one on each side of the face piece, which are attached by the 3M bayonet on the mask Hypoallergenic face piece Well-balanced for comfort Utilises 3M 2000 & 6000 series filters 6100 is small sized 6200 is medium sized 6300 is large sized.