The inclusion of clay on the top of clay mitts refers to the integration of synthetic clay or a clay-like material on the surface of the mitt.

This design feature combines the convenience of a wash mitt with the functionality of a clay bar, allowing for efficient removal of contaminants from the car's surface during washing.

The clay helps to lift embedded dirt, grime, and contaminants without scratching the paint, providing a smoother and cleaner finish compared to traditional washing methods alone.

This dual-purpose design makes clay mitts popular among car enthusiasts and detailers for maintaining the exterior of vehicles effectively.