This leave-in is for the same audience as the Repair Conditioner — people with damaged, brittle, or chemically/heat-stressed hair — who want an additional, no-rinse layer of reinforcement between washes rather than relying on the conditioner alone. Dosage scales with hair length (a pea-sized amount for short hair, coin-sized for medium, roughly two pumps for long hair), so it works across lengths without needing a different product. It suits people comfortable layering a leave-in under other styling products, rather than those who prefer a single rinse-out-only routine.

Because it shares its key actives with the Repair Conditioner, this leave-in is meant to extend that reinforcement between wash days rather than introduce a different repair mechanism — useful for hair that's damaged enough to need more than a once-per-wash treatment. Its no-rinse format also means it can be combed through and left to work while you style, which a rinse-out conditioner can't do.

After shampooing and conditioning, towel-dry hair to remove excess water. Dispense a pea-sized amount for short hair, a coin-sized amount for medium-length hair, or about two pumps for long hair into your palms. Distribute evenly through mid-lengths and ends, avoiding the scalp. Do not rinse out. Style hair as usual; for continued repair benefit, use alongside the Clean Beauty Repair Conditioner.

Pros:

• Uses the same amaranth extract and hydrolyzed pea protein actives as the Repair Conditioner, so it reinforces rather than duplicates that routine
• No-rinse format adds protection and detangling without an extra rinse step
• Dosing guidance scales by hair length, making it easy to avoid over- or under-applying
• Vegan, sulfate-free, paraben-free, and color-safe
• Bio-based, recyclable packaging (90% sugarcane)

Cons:

• Contains silicones (cyclopentasiloxane, dimethicone), so it isn't a fit for anyone specifically seeking a silicone-free leave-in
• As a no-rinse product, over-applying on fine hair can lead to buildup over repeated uses
• Paul Mitchell's public product pages don't publish a complete trailing ingredient list (fragrance and minor preservatives beyond what's listed here are not fully disclosed), so the full INCI couldn't be independently confirmed