12 / Bag. Microfiber wet mophead features polypropylene scrubbing strips that sit vertically for excellent, deep grout-line cleaning. An additional layer of microfiber enhances its fluid retention vs. a layer of foam, making it more bacteria-resistant. Durable design is washable to maintain cleanliness. Mophead is designed for Impact hook-and-loop-style microfiber mop frames (sold separately).