Designed for wet mopping in controlled environments and cleanrooms Ideal for use in sterile environments Mop heads are constructed from a continuous tube of 100% polyester knitted fabric, looped to form strands that encapsulate liquids for maximum absorption Mop heads are free of any cellulosic contaminants Textured mop heads feature ribbed, twisted strands for 60% more sorbent capacity than standard Edgeless mops Textured knitted polyester tube mop heads help eliminate contamination from breakage and deterioration of traditional string mops Mop heads are laundered and packaged in an ISO Class 4 (FED-STD-209E Class 10/M2.5) cleanroom