Born in Gielly Green’s award-winning London salons, The One Hair System brings decades of professional expertise to a simpler, luxurious haircare ritual. Its philosophy, “Fewer is the future”, means one carefully developed product in each category, created by stylists, perfected in laboratories and validated in salons.

The Core provides the foundation, while targeted leave-in Boosters personalise your routine. A shared signature scent of citrus, florals, warm woods and musk connects the collection, bringing a touch of the salon experience into everyday care.

Apply to damp hair, one pump at a time. Work evenly through the lengths and ends, then style as usual. Do not rinse.

Aqua (Water), Cetearyl Alcohol, Glycerin, Behentrimonium Methosulfate, Hydrolyzed Rice Protein Cetrimonium Chloride, Sodium PCA, Arginine, Phenoxyethanol, Guar Hydroxypropyltrimonium Chloride Proline, Citrus Aurantium Bergamia Peel Oil, Citric Acid, Ethylhexylglycerin, Propanediol Behenyl/Stearyl Aminopropanediol Esters, Parfum (Fragrance), Tetramethyl Acetyloctahydronaphthalenes Isopropyl Alcohol, Limonene, Itaconic Acid, Linalyl Acetate, Polyquaternium-37, Hexamethylindanopyran Panthenol, Propylene Glycol Dicaprylate/Dicaprate, Juniperus Virginiana Oil, Linum Usitatissimum (Linseed) Seed Extract, Disodium EDTA, Salvia Hispanica Seed Extract, Linalool, Polyglyceryl-10 Laurate, Alpha-Isomethyl Ionone Citrus Limon Peel Oil, Pinene, Hydroxycitronellal, PPG-1 Trideceth-6, Sodium Benzoate, Potassium Sorbate Citral, Benzyl Alcohol, Vanillin, Xylitol, Caprylic Acid, Acrylates/Stearyl Methacrylate Copolymer, Coumarin Beta-Caryophyllene, Sorbitan Oleate, Butylene Glycol, Terpineol, Citrus Aurantium Flower Oil Terpinolene, Geranyl Acetate, Oryza Sativa (Rice) Extract, Cedrus Atlantica Oil/ Extract, Pentylene Glycol Crocus Sativus Flower Extract, Saccharomyces Ferment Filtrate, Moringa Oleifera Seed Extract, Disodium Phosphate.