For people with blonde, bleached, highlighted, or gray hair that's developing brassy or yellow undertones and needs regular detangling — a leave-in aimed at maintaining a cooler blonde tone between salon toning or glossing appointments.

It's not intended for hair without lightening or gray coverage, since its main differentiator (purple/blue toning pigment) is built specifically to counteract warmth in light hair. It's a leave-in step, not a rinse-out deep conditioner, so it works best as routine maintenance rather than intensive repair.

The reason to reach for this over a plain detangling leave-in is the built-in toning: the violet and blue pigments are formulated to sit against the yellow-orange undertones that show up in lightened hair, doing double duty as both a detangler and a low-level color corrector between salon visits. The bi-phase design is what lets it carry both the conditioning silicones and the water-soluble toning pigments in one bottle, which is why shaking before use matters — without it, the two phases and their separate jobs don't combine.

Shake vigorously before every use to fuse the two phases together (this is what activates the brand's Kinetic Technology). Apply to damp or dry hair and comb through section by section. Do not rinse out.

Let hair dry away from contact with light-colored fabric while damp, since the toning pigments can transfer onto towels, pillowcases, and clothing.

Pros

• Purple and blue toning pigments (Basic Violet 2, Disperse Blue 377) directly counteract brassy yellow tones in blonde, bleached, or gray hair while also detangling — a dual-purpose leave-in rather than a single-function product
• Bi-phase, shake-to-activate format layers a silicone-rich smoothing phase over a lighter conditioning phase for slip without much added weight
• No-rinse leave-in application fits into a quick post-shower routine
• Sulfate- and paraben-free

Cons

• Formula relies heavily on silicones (six related silicone-type ingredients), so it is not compatible with a silicone-free or 'curly girl method' routine, despite that being implied by some older product copy
• The purple/blue toning pigments can transfer onto light-colored towels, pillowcases, or clothing while hair is still wet
• No UV-filter or sun-protection ingredient in the formula despite bleached/blonde hair being especially prone to further lightening or dryness from sun exposure
• The toning effect is cosmetic and temporary — it doesn't address the underlying porosity or protein loss that causes brassiness in over-processed blonde hair