Green Klean® Filter Bags are a combination of the best bio-degradable filter medias in recyclable poly bags at reasonable prices, yet achieve optimal performance. Specifically designed as replacements for OEM commercial vacuum bags, Green Klean® bag medias are independently tested and guaranteed to perform equal to, or better than the original OEM bags. Green Klean® filters perform at efficiency levels as low as 99.9% at 1 micron.