Proprietary HydroKnit technology is fast absorbing to wick away moisture. Made of soft pulp fibers, bonded to a polypropylene base sheet for absorbency and durability. Durable wipes absorb more water and oil than textile shop rags and stay strong for superior performance. Safer alternative to laundered rental shop towels or cloth rags (which can harbor dangerous chemicals like lead, even after washing, according to a 2013 Gradient study). Suitable for removing dirt, oil, grime and solvents. Reusable cloths are reinforced for strength when wet and dry. Contaminant-free.