White synthetic with salt & pepper synthetic border. This soft flagged synthetic fill is an excellent multi-purpose wash brush. For use on windows, cars, vans, trucks, boats, and siding. Clearcoat safe. 

Manufactured on a polypropylene block that is virtually indestructible.

These blocks are light in weight, will not crack, warp, mar, or scratch and are resistant to moisture, so as not to house bacteria, oils and chemicals. It even floats if dropped in water