Precipitated Calcium Carbonate (PCC) is widely used in rubber slippers as a cost-effective filler that not only reduces material costs but also enhances performance. It improves the strength and durability of soles, making them resistant to wear and tear. PCC contributes to better flexibility, ensuring slippers remain comfortable during prolonged use, while also giving them a smooth texture and neat surface finish. Its natural whiteness adds brightness to colored slippers and provides consistency in shade matching. By balancing cost efficiency with improved mechanical properties, PCC helps manufacturers produce high-quality, durable, and affordable rubber slippers at scale.