CHI Curl Preserve Shampoo Sometimes curly hair needs special treatment, so CHI developed CHI Curl Preserve Shampoo. This shampoo has a low pH system that works to establish the optimum moisture level in curly and wavy hair to create beautifully defined, frizz-free curls. A unique Ceramino Interlink Complex infuses hair with CHI 44 Ceramic Technology to gently moisturize and smooth the hairs cuticle. Amino acids and proteins give strength and protection while balancing the hairs moisture composition to an optimum level. The result? Soft, supple, well-defined, frizz-free curls and waves that are to die for!