Premium mop heads feature new and improved antimicrobial yarns with FOSSHIELD, a naturally safe, silver and copper ion infused fiber protected with AgION technology, which prevents the growth of bacteria, mold and mildew while reducing odors. Loopedend, 4ply construction of rayon, acrylic, and recycled PET polyester fibers, with 51/2 nylon mesh headband with six main sews and preshrunk tailbands, offers superior wear, absorbency, performance. Washable. 12 per box.