This top-quality model is perfect for cleaning your cassette, front chain rings, jockey wheels, hubs and spindles, brake arms, bottom bracket / crank interface and more. Additionally, it is made of microfibre rope, which works by attracting, removing, and holding grime. Other materials simply move grime around but microfiber works by capturing dirt, grease and particles inside its star-shaped grooves. Dirt is held deep inside the core of the fibre. Microfibers remove grime better than any other material known to man! Gear Floss is highly tear-resistant and is washable.