If you are talking about the chenille wash mitts by Viking, just make sure that it says "100% cotton" AND has the cotton logo. Otherwise, it's a blend of polyester and cotton and will cause swirls. NAPA, I understand, makes a 100% cotton wash mitt, but haven't seen one yet.
The chenille wash mitts are the ones that have the long strands that look like a mop.
Zaino sells applicators to apply the polish, not wash mitts. Too small for washing the car effectively.