NISIM F.A.S.T. Conditioner Sulfate Free 300mlF. A. S. T. Conditioner works best when it is used in conjunction with the F. A. S. T Shampoo. Leaves your hair feeling smooth and manageable. The more you use the two together the better they work. The new formula of F. A. S. T conditioner with no sulfates, parabens and DEA is just as effective as the original version and guaranteed! Does it really work? Yes! It really works. FAST works by feeding the hair with essential nutrients, amino acids and