Biolage Ultra Hydra Source Deep Treatment Mask delivers intense hydration for very dry hair with nourishing Cupuaçu Butter. It leaves hair incredibly soft, smooth, and manageable, offering 5x more moisture and 15x smoother strands after just one use. Designed for all thick hair textures, including curls, it helps reduce buildup while providing just the right amount of moisture. Free from parabens, mineral oil, and colorants.