The Rubbermaid Commercial Trapper Dust Mop has a blend of post-industrial four-ply cotton and synthetic fibers for better launderability, durability, and dust retention than traditional cotton dust mops and is made with looped ends that resist fraying and withstand laundering better than cut ends. This floor mop head is pretreated with a mineral oil-based mop treatment to improve dust attraction and retention. The pretreatment has a lemon fragrance and lasts for one to three months depending on use conditions. It has a slip-on style synthetic backing sleeve that fits a dust mop frame (sold separately) without requiring strings. This floor mop is suitable for commercial and industrial applications.