Preservo Strengthening Serum (STEP 1) is applied to the whole head just prior to relaxing to protect and condition hair during chemical processing.Features: • Contains Fiber Strengthening Complex (FSC), a revolutionary conditioning complex exclusive to Avlon that penetrates deep within the hair shaft while cuticles are open during relaxing.• Consists of special strengthening and conditioning ingredients that minimize swelling, preserve strength and restore hair’s natural luster.Benefits• Retards breakage and shedding.• Helps hair retain tensile strength and elasticity.• Can be used prior to color services.• Decreases hair porosity.• Helps weak, brittle hair ends become more pliable.• Conditions hair as it moisturizes and adds volume.• Imparts a smooth, silky feel to hair. Please consult your Hairdresser Before buying any professional HairCare.