1.cleaning without detergent or soap 2.size can determined by you It can clean things with water no need detergent or soap,it is widely usedin kitchen,bathroom,floor,ceiling,sofa,car,office euquipmemt,etc.Nano sponge also called melamine sponge,It is also can used for interior decoration in super market,gym because it is cansoundproof,so can made of acoustic panel. It is also can used in aviation ...