The Rubbermaid Commercial Twisted Loop Dust Mop Head has a blend of post-industrial four-ply cotton and synthetic fibers for better dust retention, durability, and launderability than traditional cotton dust mops. These dust mop heads are made with twisted loops that resist snagging and provide better dust retention and coverage than regular looped-end or cut-end dust mops. This mop head has a polyester backing sleeve that fits a standard or breakdown-style dust mop frame (sold separately). This dust mop head is pre-laundered to reduce shrinkage, and is suitable for commercial and industrial applications.