Why do sponges have plastic bristles attached to it?

Sponges with plastic bristles are designed to enhance cleaning efficiency by providing added scrubbing power without damaging surfaces. The bristles help to dislodge dirt and grime more effectively than a regular sponge would. Additionally, the plastic bristles can improve the sponge's durability and longevity, making it more effective for repeated use. However, there are environmental concerns regarding the use of plastic in cleaning products, as it can contribute to pollution.