This is what I use. Taken from a website.
RAGGTOPP Cleaner and RAGGTOPP Protectant have been thoroughly tested and endorsed by HAARTZ, the world's leading manufacturer of convertible topping fabric since 1907. HAARTZ is the designated supplier of convertible topping fabric for virtually every U.S. automaker and most European manufacturers, and is the world's only manufacturer of both PVC and cloth combined automobile and sport utility topping.
