Premium mop heads feature new and improved antimicrobial yarns with FOSSHIELDÌ´å¬ , a naturally safe, silver and copper ion infused fiber protected with AgIONÌ´å¬ technology, which aids in preventing the growth of bacteria, mold and mildew while reducing odors. Looped-end, 4-ply construction of rayon, acrylic, and recycled PET polyester fibers with 5 1/2" nylon mesh headband with six main sews and pre-shrunk tailbands offers superior wear, absorbency, performance. Launderable. Minimum order quantity is 12. This product is a mandatory purchase item for the Veterans Administration.