FLTR masks do not contain any graphene nor biomass graphene.

FLTR general use masks are 3-ply masks made of a combination of non-woven polypropylene fabric and melt-blown polypropylene filtration layers.

https://support.fltr.com/kb/article/68-general-use-face-mask-specification/

FLTR95 Sealing face masks are 5-ply masks made of a combination of non-woven polypropylene fabric, hot-air ES cotton, and melt-blown polypropylene filtration layers.

https://support.fltr.com/kb/article/67-hlt118-costco-1428311-fltr95-sealing-face-mask-white/

FLTR N95 respirators are 3-ply respirators made of a combination of polyester fabric and melt-blown polypropylene filtration layers.

https://support.fltr.com/kb/article/65-hlt158-costco-1499713-niosh-n95-respirator-specification/