Alterna Caviar Anti-Aging Professional Styling Concrete Clay is an ultra-hold styling clay that provides long-lasting texture and separation with a matte finish. Hold level 4. FLEX-STRENGTH COMPLEX: Proprietary complex is a synergistic blend of strengthening proteins and nourishing extracts designed to promote healthier hair while supporting beautifully coiffed styles. Pearl Proteins reinforce the strength of the hair fiber. Panthenol, Keratin & Biotin fortify each strand and increase flexibility to prevent breakage during the styling process.