Dangerous.

Airborne.

Particulates.

A inexpensive alternative to using Proteam 100331 vacuum filters. Fits same backpack vacuum models as Proteam 100331, such as these 10 quart backpack vacuums:  SuperCoach, SuperCoach HEPA, CoachVac, MegaVac, 

Also fits these other backpack vacuum brands:  Clarke backpack vacuums, Windsor VP10 backpack vacuums, 

10 bags per back.  10 quart sized bags.

When health and safety of others (including your own) . . . just matters more.