Dehydrated hair? This is caused by losing moisture. The L'Oreal Paris Elvive Hyaluron Plump 72H Moisture Filling Shampoo instantly coats the cuticles and fills hair with 72H of moisture, for shinier, 10x more hydrated, and revitalised hair with no weigh down, when used with the conditioner from the range. The Power of Hyaluronic Acid Naturally found in the body, this molecule retains 1000x its weight in water to help replump hair.