EATON'S LOFCLEAR series 100 filter bags are designed to make high efficiency filtration with unique three layer construction. Affective for a wide range of particle sizes with dirt capacities of up to 0.5 lbs. The layered design includes a polypropylene pre-filter layer, a meltblown polypropylene micro fiber final filter layer, and a polypropylene outer migration barrier layer, resulting in a cost effective filter bag.