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The Overnight Repair Serum Treatment for Dry, Damaged Hair

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$46.40 $58.00
What it is: A lightweight, overnight leave-in treatment clinically proven to restore strength, softness, and shine while you sleep—turning dream hair
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Estimated delivery Oct 19–Oct 24
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Crown Affair

What it is: A lightweight, overnight leave-in treatment clinically proven to restore strength, softness, and shine while you sleep—turning dream hair into reality.

Hair Texture: Straight, Wavy, Curly, and Coily

Hair Type: Fine, Medium, and Thick

Hair Concerns:
- Damage, Split Ends, and Breakage
- Frizz
- Shine

Key Benefits:
- Strengthens, repairs, and reduces breakage
- Hydrates hair and reduces frizz overnight
- Restores softness and enhances shine

Highlighted Ingredients:
- Superfood Blend: Repairs and strengthens while preventing breakage and damage to dry hair.
- Tsubaki Meadows™: Weightlessly hydrates and strengthens from the inside, preventing damage.
- Rosemary Leaf Extract: Enhances shine and strength so hair feels smoother and fuller.

Ingredient Callouts: This product is vegan, gluten-free, and cruelty-free.

What Else You Need to Know: This serum is clinically proven to leave hair up to two-times stronger, softer, and smoother after one use. All you have to do is dream—good things can happen overnight. Made with a powerhouse blend of superfoods, weightless hydration, and fortifying ingredients, you’ll wake up to noticeably healthier and repaired hair over time.

Fragrance Description: This serum is fresh, uplifting, and spa-like with notes of sparkling yuzu, green tea, bergamot, and sandalwood.

Clinical Results: Based on a 4-week clinical study:
- Strengthens hair up to 2X after 1 use
- Reduces breakage by 75%
- 8+ hour frizz protection after 1 use

In a consumer perception study of 39 women over 4 weeks:
- 100% agreed there was no product transfer onto the pillow
- 98% agreed hair felt weightlessly hydrated, soft, and shiny
- 97% agreed hair was easily combed and detangled in the morning

Clean at Sephora
Clean at Sephora is our commitment to offering effective products without certain ingredients, such as parabens, sulfates, phthalates, and mineral oils. Learn more here.

Verified Purchase
6d ago
magic potion
I know sounds like an exaggeration but this stuff is magic in a bottle. It's like if potions were real and you could put them in your hair, like some real Harry Potter level of wizardry. I would stop by Sephora every so often to use the tester of this serum whenever my hair looked dull, frizzy, and dry, and after a few pumps it would be shiny, soft, and form bouncy uniform ringlets (and I have wavy hair which is known for being difficult – half wants to curl and half wants to be straight. It doesnt help that my hair was cut into layers with a razor). I finally bit the bullet and got myself my own serum and yeah I can comfortably say this stuff works wonders. My hair is beautiful with the serum and whenever it's in I feel more confident in my hairs appearance.
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review photo review photo
ryeautumn
1mo ago
Don’t waste your money
I have gone through a half bottle and I can tell you it did absolutely zero. A complete waste of money, did not improve my hair at all
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pinkbabs
1mo ago
love this stuff!
i really can tell a difference with this! leaves my hair feeling soft and smooth within just one use. and the bottle lasts forever!!
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JuliaHan1998
1mo ago
Hair feels healthier!
I've been using this overnight hair repair serum for about a week now, and I'm really impressed with how effective it is without leaving a residue on my hair in the morning. I also love that you can barely smell it at all because I'm sensitive to scented products. I have fine, color-treated, blonde hair and live in a very dry climate, so my hair often feels fried or frizzy, and this serum has helped it both look and feel more sleek and healthy. My teen daughter (who has very thick, sometimes oily, dark hair) has also tried it and loved it; it's lightweight so doesn't ever look greasy in her hair. All in, highly recommend for multiple hair types! Thanks to the Stellar Product Testing Panel for giving me a chance to try this out.
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AllyinCO
Incentivized
Verified Purchase
1mo ago
Love it so much!
LOVE LOVE LOVE! New fave overnight hair serum! doesn't smell weird like others. Great size for the price and leaves hair super soft. i use it during the day too.
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rostasthompson
1mo ago
It doesn’t do anything
In effective. I don’t notice any change in my hair. Waste of money
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Noelyamg
1mo ago
Automatic Re-Purchase
This product is amazing! It leaves my hair feeling luxurious and soft the next day without looking flat or greasy. The smell is also incredible. Will be re-buying as soon as I’m out.
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K8skin
Verified Purchase
1mo ago
A gentle, beautifully scented product that has tru
I’m really impressed with Crown Affair! It has helped my bleached hair so much—it feels healthier, softer, and more nourished. The fragrance is also very delicate and pleasant. I’ve tried several other hair products, but this one is definitely one of my favorites. Highly recommend! ✨
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LouJanne
Verified Purchase
1mo ago
Worth it
Im currently at my second bottle this year, i honestly love how it makes my hair feel especially with their hair oil 10/10 would keep buying
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lxly12
1mo ago
Nice overnight serum
Thanks to the Stellar Product Testing Panel for providing me with this hair care item. I have never used an overnight hair serum and I’m happy to have tried this one. It feels very nice and soft going into hair. It was easy to apply and the bottle having a pump helps a lot. I noticed the morning after using the serum it was easier to brush my hair and my hair felt nice and soft. My hair felt smoother and I feel like it had less frizz. It was easy to incorporate into my nighttime routine. I was scared it would make my hair greasy but it did not and I was so happy. Overall I was most impressed by how much smoother and healthier my hair looked. I have natural waves and the frizz can sometimes be out of control in the morning and I feel like it helped tame that. Only reason I gave it a 4/5 is because it smells nice but the scent is a bit strong when you first put it on. It eventually dies down but other than that it’s a nice overnight serum.
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review photo review photo
Megannnmmmm
Incentivized

What it is: A lightweight, overnight leave-in treatment clinically proven to restore strength, softness, and shine while you sleep—turning dream hair into reality.

Hair Texture: Straight, Wavy, Curly, and Coily

Hair Type: Fine, Medium, and Thick

Hair Concerns:
- Damage, Split Ends, and Breakage
- Frizz
- Shine

Key Benefits:
- Strengthens, repairs, and reduces breakage
- Hydrates hair and reduces frizz overnight
- Restores softness and enhances shine

Highlighted Ingredients:
- Superfood Blend: Repairs and strengthens while preventing breakage and damage to dry hair.
- Tsubaki Meadows™: Weightlessly hydrates and strengthens from the inside, preventing damage.
- Rosemary Leaf Extract: Enhances shine and strength so hair feels smoother and fuller.

Ingredient Callouts: This product is vegan, gluten-free, and cruelty-free.

What Else You Need to Know: This serum is clinically proven to leave hair up to two-times stronger, softer, and smoother after one use. All you have to do is dream—good things can happen overnight. Made with a powerhouse blend of superfoods, weightless hydration, and fortifying ingredients, you’ll wake up to noticeably healthier and repaired hair over time.

Fragrance Description: This serum is fresh, uplifting, and spa-like with notes of sparkling yuzu, green tea, bergamot, and sandalwood.

Clinical Results: Based on a 4-week clinical study:
- Strengthens hair up to 2X after 1 use
- Reduces breakage by 75%
- 8+ hour frizz protection after 1 use

In a consumer perception study of 39 women over 4 weeks:
- 100% agreed there was no product transfer onto the pillow
- 98% agreed hair felt weightlessly hydrated, soft, and shiny
- 97% agreed hair was easily combed and detangled in the morning

Clean at Sephora
Clean at Sephora is our commitment to offering effective products without certain ingredients, such as parabens, sulfates, phthalates, and mineral oils. Learn more here.

-Superfood Blend: Repairs and strengthens while preventing breakage and damage to dry hair.
-Tsubaki Meadows™: Weightlessly hydrates and strengthens from the inside, preventing damage.
-Rosemary Leaf Extract: Enhances shine and strength so hair feels smoother and fuller.

Water/Aqua/Eau, Dimethicone, Propanediol, Cetyl Alcohol, Isopentyldiol, Linum Usitatissimum (Linseed) Seed Extract, Salvia Hispanica (Chia) Seed Extract, Rosmarinus Officinalis (Rosemary) Leaf Extract, Limnanthes Alba (Meadowfoam) Seed Oil, Camellia Japonica (Tsubaki) Seed Oil, Panthenol, Arginine, Tetrahexyldecyl Ascorbate, Oryza Sativa (Rice) Bran Extract, Glycerin, Tocopherol, Stearamidopropyl Dimethylamine, Parfum/Fragrance, Behentrimonium Chloride, Lactic Acid, Methylpropanediol, Melia Azadirachta Leaf Extract, Caprylyl Glycol, Cyamopsis Tetragonoloba (Guar) Gum, Itaconic Acid, Tetrasodium Glutamate Diacetate, Polyquaternium-80, Polyglyceryl-10 Laurate, Sodium Hydroxide, Glyceryl Stearate, Didecyldimonium Chloride, Helianthus Annuus (Sunflower) Extract, Benzyl Alcohol, Melia Azadirachta Flower Extract, Xylitol, Caprylic Acid, Isopropyl Alcohol, Tetramethyl Acetyloctahydronaphthalenes, Limonene, Juniperus Virginiana Oil, Linalyl Acetate, Linalool, Pinene, Citral, Beta-Caryophyllene.

The list of ingredients is subject to change. Please consult the packaging of the product purchased.
Suggested Usage:
-Before going to sleep, apply one to two pumps onto dry* hair, focusing on the mid-lengths to ends.
-Use more if needed.
-Comb through for maximum and even absorption.
-Leave in overnight; no need to rinse in the morning.
-Wake up radiant and ready to go.
-Repeat two to three nights a week.

*Can be used on damp hair but recommend application on dry hair for easy morning maintenance.
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