Tork Biobased Heavy-Duty Cleaning Cloth White W4: Reduce your environmental impact with sustainable cleaning cloths that are OK Biobased certified by TV Austria. This guarantees the renewability of raw materials used to lower their environmental impact. The outer packaging is made from 100% recycled fibres, while the inner packaging is made with 30% post-consumer recycled plastic. These cloths offer the same high performance as conventional heavy-duty cleaning cloths. Their exelCLEAN technology makes cleaning up to 30% faster, 20% easier and reduces solvent consumption by up to 40% compared to mixed rags (Swerea claims, 2014).