Advanced microfiber head design features two different types of fiber, each with built-in antimicrobial protection against odor-causing bacteria, mold and mildew. Soft, tightly woven microfiber strings have incredible absorption and release capabilities, mopping up spills quickly, efficiently and leaving floors nearly completely dry. Wide, flat strips are designed for heavy scrubbing, with a woven nylon webbing that scrubs deep down dirt without scratching. Advanced, next-generation cone design – smaller, sleeker, lighter – providing superior wringing performance with less effort.