Proven to remove 99.9% of microorganisms. High-quality, dense, ultra-fine microfiber removes bacteria, making cleaning quick and effective. 100% split microfiber picks up and holds dirt, dust and grime. Double-bound edges for durability. Machine-washable pad withstands more than 500 washings, 200 with bleach. Improved hook-and-loop backing attaches securely to pad holders