Elizavecca CER-100 Collagen Coating Protein Ion InjectionElizavecca CER-100 Collagen Coating Protein Ion Injection is a deep conditioning hair mask formulated with collagen, ceramides, vegetable proteins, and other ingredients to nourish and moisturize, revitalizing damaged hair.Best used in combination with Elizavecca CER-100 Collagen Ceramide Protein Treatment. Size: 50 mLHow To Use:Apply to damp, clean hair.2. Wait 5-20 minutes.3. Wash off with water and proceed as usual.