The Living Proof Moisture Rescue Mask is an in-shower treatment designed to intensely nourish dry, dull hair. The rich yet lightweight formula works to replenish lost moisture, helping strands feel smoother, softer and easier to manage. Powered by Smart Barrier HairTech, the formula helps replenish essential lipids to improve softness and shine, while flyaways feel more controlled. With continued use, the mask helps protect against dryness for several washes, leaving hair feeling conditioned and glossy.