The Rubbermaid Commercial Dura Pro Blend Cut End Mop is constructed of 4-ply cotton/rayon/synthetic yarn blend for greater absorbency than cotton floor mops. Synthetic floor mop fibers withstand laundering better and dry faster, both factors leading to longer product lifespan because harmful bacteria grow in a damp mop. In traditional string mop construction, coarse strings of cotton yarn are banded at the head for connection to a handle, and the strings hang loose at the tail.