■ Since the hair is made of ultra-fine fiber of about 1/300 thick fibers, there are countless spaces between the fibers and the fibers to quickly suck away dirt. ■ This product is environmentally friendly, since it does not require little detergents. ■ No need to wipe twice (finishing wipe) without leaving any residue, streak, or hazy residue. ■Easy to care for by hand and machine (The effect will not change)