This is actually one of those infamous half-truths that float around unsubstantiated for years.
THE TRUTH: ALL of Jon Renau’s HD (Heat Defiant) wigs come with a free wide-toothed comb because you should NEVER use anything to style them which has finer bristles or teeth than that comb. Heat-resistant fiber is more fragile and prone to styling damage than regular synthetic hair. They include that comb to help you out.
None of Jon Renau’s other product lines come with a free comb.