New

Overnight Leave-In Mask

Overnight Leave-In Mask

For all hair types

£39.00
£39.00
£32.50 100ml

Including VAT, excluding shipping

Out of Stock

A lightweight, no-rinse formula for 4x more hydrated, easier-to-detangle hair by morning.*

size

Overnight Leave-In Mask

For all hair types

£39.00 (£32.50/100ml)

Including VAT, excluding shipping

Key Ingredients

  • Argan Oil
    Argan Oil

    Extremely rich in tocopherols (Vitamin E), essential fatty acids, and antioxidants, this natural oil helps to nourish.

  • Supercharged Hyaluronic Acid
    Supercharged Hyaluronic Acid

    A blend of seven molecular weights of hyaluronic acid to ensure maximum hydration, nourish and soften the hair, and help to enhance elasticity.

  • Vegan Snail Mucin
    Vegan Snail Mucin

    A bio-engineered snail mucin alternative made from vegan sources, this K-beauty star helps condition and hydrate hair by replicating the healing and regenerative properties of snail’s mucin, helping to seal the cuticle and lock in moisture.

FAQ

How do I use Overnight Leave-in Mask?

Before bed, apply to damp or dry hair from mid-length to ends. Use 1–2 pumps for fine hair, 2–3 for medium, and 3–4 for thick or curly hair. Leave in overnight and style as usual in the morning.

Do I need to rinse it out the next morning?

No. It's a leave-in, so it stays in overnight with no rinsing necessary. Just wake up and style as usual.

Will it leave my hair feeling greasy?

No. Applied to mid-lengths and ends as directed, the weightless formula absorbs without leaving a heavy or greasy feel, or residue on your pillow.

Is it suitable for all hair types?

Yes. It's made for all hair types, and it's especially suited to dry, dull, or dehydrated hair in need of hydration.

What are the key ingredients, and what do they do?

Argan oil helps to nourish, supercharged hyaluronic acid (a blend of seven molecular weights) helps hydrate and soften, and vegan snail mucin helps condition and helps seal the cuticle to lock in moisture. The formula is vegan and cruelty-free.

Can I use it alongside my regular conditioner and leave-in?

Yes. It's a no-rinse overnight step that fits into your existing routine rather than replacing your daily products. Use your usual conditioner and leave-in as normal, and apply the mask at night when hair wants extra hydration.

Overall rating: 4.65 / 5 from 20 reviews.

AI Generated Review Summary

Summary topics

Review topics: [feeling, look, hair, smells, use, mask].

Review highlights

Reviews

Absolutely Love This Overnight Mask!

"I absolutely love the Moroccanoil Overnight Leave-In Mask! I’ve recently been wearing my hair straight, and this product has made such a noticeable difference. I apply it before bed, and when I style my hair the next day, it feels incredibly soft, smooth, and hydrated. It helps keep my hair frizz-free and silky smooth, and the shine is absolutely beautiful! My hair looks healthier, feels softer, and has that gorgeous, polished look without feeling weighed down or greasy. I also love that I can use it overnight without having to rinse it out. It gives my hair that extra boost of moisture while I sleep, and the results are amazing. And, of course, the Moroccanoil scent is heavenly! 💕 If you want smoother, softer, shinier, more manageable hair, I highly recommend this product. It’s definitely a new favorite in my hair routine! 10/10!"

— Lara G. (5/5)

Ok product, smells great, but doesn’t do much for my hair.

"Let me start by saying, I absolutely LOVE this brand! However, this product did not live up to my expectation. It smells great, but it didn’t do much for my hair as far as leaving it feeling any different. The shampoo, conditioner, and oil work fantastic for me, but this, not so much."

— Amy W. (2/5)

LOVE This!

"This overnight mask is truly remarkable! At first, I was concerned that it might make my hair feel greasy or weigh it down with heavy product. However, I was pleasantly surprised. The formula is incredibly lightweight, and it absorbed into my hair while I slept. When I woke up, my hair felt incredibly soft, smooth, and revitalized. It’s a game changer for my nighttime routine!"

— Roseann (5/5)

Blown Away by this product!!

"I love MO, so I decided to try the new product. I didn't have high expectations because I thought it might feel/look too heavy/greasy, but I was wrong! I used it once and received so many compliments. It smells amazing, lasts for days, and helped with my hair frizz. I don't wear my hair down often in the summer since it will frizz, but now I can when I use this! It feels super healthy after, and I'm excited to wear my hair naturally more."

— Jackie (5/5)

Overnight Leave-in Mask

"Love this overnight mask! I have used it over night as instructed and also during the day with my styling process and can see the change and am left with shiny health hair. Would definitely make this part of my daily routine from now on and would highly recommend."

— Diana (5/5)

Overnight Leave-In Mask

"I was worried this would be too heavy for my hair type, but I have loved it so far! Does not seem to weight my hair down and has that great Moroccan Oil scent!! Made my hair soft but not too soft that it's unmanageable."

— Tracy (5/5)

Silky smooth in the morning!

"My hair felt silky and soft after only one use. I will be using this regularly to maintin my hair. I might see if I can get my husband to use it also."

— Kimberly (5/5)

Manageable Hair

"This product made my hair softer and more manageable. I did feel however that it made my hair look slightly greasy."

— Lois (5/5)

Overnight leave in mask

"It smells AMAZING. Made my hair soft and not greasy feeling after using it"

— Georgi (5/5)

Another hit from Moroccanoil

"Another great item Moroccanoil has come out with. Easy to use, leaves hair looking full and shiny."

— Carol (5/5)

Q&A

YOUR GIFT IS WAITING*

*FREE Travel Size Hydrating Shampoo 70ml + Hydrating Conditioner 70ml with Orders £65+

Transform your hair while you sleep with Morccanoil Overnight Leave-in Mask—the ultimate solution for dry, dehydrated strands. This leave-in mask makes your morning routine effortless by reducing frizz, minimizing split ends, and preventing tangles while you sleep for lasting smoothness. Powered by argan oil, supercharged hyaluronic acid, and vegan snail mucin, this overnight treatment works while you sleep, leaving hair beautifully conditioned and touchably soft, with a healthy-looking shine. The weightless formula delivers intense hydration and deep nourishment without leaving residue on your hair or pillow.

 

Increases hydration by 4x overnight*

Hydration lasts for 3 washes**

Hair is 3x easier to detangle in the morning*

 

In a consumer study:

•98% loved how easy the mask is to use

•96% agreed hair looks and feels healthy

•94% agreed hair has lasting smoothness

•94% agreed this mask is comfortable to sleep in

 

*Based on instrumental testing after eight hours.

**Based on an independent lab study.

AQUA/WATER/EAU, CAPRYLIC/CAPRIC TRIGLYCERIDE, UNDECANE, GLYCERIN, TRIDECANE, CETEARYL ALCOHOL, PARFUM/FRAGRANCE, PANTHENOL, ARGANIA SPINOSA (ARGAN) KERNEL OIL, XIMENIA AMERICANA (SOUR PLUM) SEED OIL, HELIANTHUS ANNUUS (SUNFLOWER) SEED WAX, GLYCERYL STEARATE, JOJOBA ESTERS, DIMETHICONE, XYLITYLGLUCOSIDE, SODIUM PCA, XANTHAN GUM, ANHYDROXYLITOL, SODIUM STEAROYL GLUTAMATE, BUTYLENE GLYCOL, PROPANEDIOL, XYLITOL, ETHYLHEXYLGLYCERIN, AMMONIUM ACRYLOYLDIMETHYLTAURATE/VP COPOLYMER, POLYGLYCERYL-10 PENTAISOSTEARATE, POLYGLYCERIN-3, BETA-GLUCAN, ALTHAEA OFFICINALIS (MARSHMALLOW) ROOT EXTRACT, SODIUM ACETATE, 1,2-HEXANEDIOL, CITRIC ACID, HELICHRYSUM STOECHAS (MEDITERRANEAN STRAWFLOWER) FLOWER EXTRACT, SODIUM HYALURONATE, DIPEPTIDE-2, GLYCOPROTEINS, HYDROLYZED GLYCOSAMINOGLYCANS, COPPER GLUCONATE, PHENOXYETHANOL, POTASSIUM SORBATE, SODIUM BENZOATE, LINALOOL, ALPHA-ISOMETHYL IONONE, EVERNIA PRUNASTRI (OAKMOSS) EXTRACT, CAMPHOR, CARVONE, HEXAMETHYLINDANOPYRAN, LINALYL ACETATE, TETRAMETHYL ACETYLOCTAHYDRONAPHTHALENES, EUCALYPTUS GLOBULUS OIL, LAVANDULA (LAVENDER) OIL/EXTRACT, MENTHA VIRIDIS (SPEARMINT) LEAF OIL, ISOEUGENYL ACETATE. MOOHM01

Apply to damp or dry hair before bedtime, from mid-length to ends. No rinsing necessary. For fine hair, use 1–2 pumps. For medium hair, use 2–3 pumps. For thick or curly hair, use 3–4 pumps.

Stylist Tip:
Can also be used as a daytime treatment, especially for second-day or third-day hair to provide an instant boost of hydration.