A clay mitt, or clay bar mitt, is a specialized tool used in car detailing and washing. It combines the cleaning ability of a clay bar with the convenience of a wash mitt. Here's how it works:

1. Surface Cleaning: Like a clay bar, the clay mitt removes contaminants from the surface of the car that regular washing can't lift. These contaminants include brake dust, industrial fallout, tree sap, and other stubborn debris.

2. Material: It's typically made of a synthetic clay material or a blend of materials that mimic the cleaning action of traditional clay bars.

3. Usage: To use a clay mitt, you lubricate the surface of the car with a detailing spray or soapy water, then gently glide the mitt across the paint. The clay particles embedded in the mitt grab and lift contaminants from the surface.

4. Advantages: Compared to clay bars, clay mitts are easier to use because they fit over your hand like a wash mitt, providing better control and reducing hand fatigue during use. They can also cover larger areas more quickly.

5. Maintenance: After use, rinse the clay mitt thoroughly to remove any trapped contaminants. Store it in a clean, sealed container to prevent it from drying out or picking up dirt between uses.

Clay mitts are popular among car enthusiasts and detailers for maintaining a smooth, contaminant-free finish on vehicle paintwork.