Biolage Hydra Source Deep Treatment Mask is a rinse-out weekly treatment for dry hair, infused with fermented aloe and micro-filtered hyaluronic acid. It was previously sold as the Hydra Source Deep Treatment Pack and comes in a squeeze pouch, with a larger tub also available.

Biolage says it infuses dry hair with moisture and nourishment, helps prevent breakage and leaves hair feeling softer and healthier. In Biolage's testing, Hydra Source Shampoo followed by the deep treatment gave 5x more hydration and 14x smoother hair after one use, compared with a non-conditioning shampoo.

Use it once a week in place of the Hydra Source Conditioning Balm: apply to wet hair, leave for 3 to 5 minutes and rinse. It is vegan and safe for color-treated hair. Each 100 ml pouch holds at least four applications.

Aqua / water / eau, Cetearyl alcohol, Amodimethicone, Behentrimonium methosulfate, Behentrimonium chloride, Parfum / fragrance, Phenoxyethanol, Isopropyl alcohol, Benzoic acid, Polyquaternium-7, Trideceth-6, Limonene, Ricinus communis seed oil / castor seed oil, Hydroxypropyl guar, Aloe barbadensis leaf juice, Pentaerythrityl tetra-di-t-butyl hydroxyhydrocinnamate, Potassium hydroxide, Cetrimonium chloride, Hexyl cinnamal, Coumarin, Benzyl alcohol, Linalool, Amyl cinnamal, Sodium hyaluronate, 2-oleamido-1,3-octadecanediol, Sodium benzoate, Geraniol, Citric acid, Potassium sorbate