Microfibre "Micro Borste" floor mop in strong quality for all 42 cm - spare head Lifts dust like a magnet.Polypropylenfibres resolve the dirt (like a brush) and the polyesterfibres take the dirt in for a efficient cleaning without stripes.Great for glossy and structured surfaces, old flags and mortices. Do not use for dry !You should wash (max 60°C) your microfiber cloth before first use (do not use fabric softener). Avoding the use of a laundry bag.