THREE Micro-Fiber Dry Dust Mop Cover for 4' x 15' Bona MicroPlus Mop: Velvety soft, shaggy micro fiber designed for dry dusting on hardwood and hard surface floors. 'Super Electrostatic Action' attracts and lifts dust, pet hair, micro-particles and common household allergens from floors or other flat surfaces. Combination of special micro-fibers engineered into this duster pad creates a unique static charge so dust and debris are attracted like to a magnet. Reuse and wash up to 300 times. Economical. Replaces costly disposable paper dusting pads.