Uses the highest quality filter media including Melt-Blown inner liner in order to achieve filtration efficiencies up to 99.9%. Designed specifically for commercial use, they are always equal to, or exceed OEM quality. Better filtration means cleaner air, less dusting, longer secondary filter life, at considerable savings. Back by the Green Diamond Warranty. Maintains suction longer than conventional bags: better suction, less vacuuming. Keeps machines running at peak performance. Removes many indoor allergens, especially in the critical 0.3 to 1 micron range.