... . There are always some disappointment in those traditional cotton-mop or glue-mop, they are either or,wasting time and might harmful ... long service life is another amazing specific characteristic of this mop. Each mop head can stand at least one year. Advantage:*Screw ... dry(Especially for hair,because Nano superfine fiber mop-header is static.)*Round mop-header, can clean every corner of your house ...