Muc-Off microfibre cloths contain an amazing "split fibre" technology, which greatly increases surface absorption to easily remove stains and super-stains. In addition to this, the muc-off microfibre traps dirt in the cloth, helping to prevent the possibility of swirling, which could ultimately lead to paint damage. Because they are cloths made from very small fibres, you'll be cleaning at a much deeper level, meaning that whether it's indoors or outdoors, bikes or cars, you can be sure it's removing dirt and grime! The Muc-Off R&D team thought of everything and made sure that these handy cleaning cloths are machine washable, which means you can use them over and over again by washing them in the washing machine.