This is caused by losing moisture. Our Rehydrating Conditioner instantly coats the cuticles and fills hair with 72H of moisture**, for shinier, 10x more hydrated** and revitalized hair with no weigh down, when used with the conditioner from the range. ** Instrumental test on shampoo + conditioner The Power of Hyaluronic Acid Naturally found in the body, this molecule retains 1000x its weight in water to help replump hair.