Microfibers are tiny fibers that have been slit into millions of finer fibers that are no thicker than one-hundredth of a human hair. The special slitting process produces an ultra-fine fiber with wedge shape filaments and a core of nylon. The wedge shape, the nylon core, and the smaller size fiber are the key to their effectiveness. When these tiny fibers are woven together into cloth through a unique weaving method, the result is a powerful cleaning tool. Each cloth consists of tens of thousands of tiny storage compartments that lift the dirt, trap the waste and leave a clean streak-free surface. Thy nylon core within the microfiber forms tiny cutting edges that break up surface dirt and easily absorb and remove oils and other grimy substances. The only solvent you need is water!Microfiber can accumulate and absorb more particles of dirt and bacteria than any other fabric known. It can absorb up to 7 times its weight in dirt or liquid