L'Oreal Elvive Hydra 72hr Moisture Wrapping Mask 300ml. Discover our new NEW Elvive Hydra Hyaluronic 72H Moisture Wrapping Mask with Hyaluronic Acid, from L'Oréal Paris.. Tackle dehydrated, dry hair, with our nourishing treatment formula, infused with Hyaluronic Acid, weightlessly coats hair to keep it feeling hydrated for up to 72 hours. This nourishing treatment formula, infused with Hyaluronic Acid, weightlessly coats hair to keep it feeling hydrated for up to 72 hours.. The results?. Hair looks visibly plumped, bouncy and shiny. Our scientifically proven skincare inspired formula helps tackle dehydrated, dry hair, the first sign of hair damage.