20-60 GSM Meltblown Nonwoven Filter Media for Vacuum Cleaner Dust Bags High Dust-Holding Capacity & Low Airflow Resistance Product Overview Engineered specifically for vacuum cleaner dust bags and industrial dust collection systems , our 20 – 60 GSM Meltblown Nonwoven Filter Media is produced from 100% virgin polypropylene (PP) using high-velocity hot-air fiber attenuation. Featuring an ultra-fine fiber network with gradient pore structure, it delivers high fine-dust capture