Free delivery · 30-day money-back guarantee
Commended, Beauty Shortlist Awards 2026
Moumoujus
The Mantle Extremolyte Barrier Serum, 50 ml frosted glass bottle with a gold pump

The MantleExtremolyte Barrier Serum

A lightweight barrier serum that calms and strengthens sensitive, reactive skin.

£48.0050 ml
  • Happy Face Guarantee: full refund within 30 days, even if opened
  • Free delivery, dispatched in 1–2 working days
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  • 1.5%

    Ectoin

  • 3%

    Ceramide complex

  • 2%

    Peptide

  • 0%

    Fragrance

  • Calms and comforts reactive, sensitive skin
  • Replenishes the barrier so skin holds on to moisture
  • One lightweight step under SPF and makeup

Commended, Beauty Shortlist Awards 2026

“As someone with VERY sensitive skin, this product was absolutely amazing and so soft, gentle yet effective for my skin. It left my skin feeling so smooth, nourished and hydrated. I’ve always been hesitant trying new products on my fussy skin but this had to be a no-brainer, the science behind it is fantastic and you can tell Fabio has put so much care, effort and time into understanding different types of skin, even the difficult ones. Thank you Fabio 🤍”
Noor A.
What it does

A lightweight barrier serum, made for sensitive, reactive and easily irritated skin.

A 3% ceramide complex with cholesterol and phytosphingosine replenishes the lipids your barrier is made of. Hyaluronic acid, glycerin and saccharide isomerate hydrate. 1.5% ectoin helps skin hold on to that water and cope with everyday stress, and 2% Matrixyl® Morphomics™ peptide supports firmer, smoother-looking skin.

Free from: fragrance, essential oils, silicones, drying alcohols, parabens.

How to use
  1. 1Cleanse. Start with clean skin, morning and evening.
  2. 2Apply. Press 2–3 pumps into face and neck, after any serums.
  3. 3Protect. Follow with SPF in the morning. It sits well under makeup.
Ingredients

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Dermatologically tested · Vegan · Cruelty-free · Made in the UK

Delivery & returns

Free delivery, dispatched in 1–2 working days. UK delivery in 2–4 working days after dispatch; worldwide delivery is free too.

Happy Face Guarantee: Try it for 30 days. If it's not right for your skin, send it back for a full refund. Opened is fine, as long as it's at least half full. We cover the return postage. One refund per customer.

Shipping policy · Refund policy

Customer reviews

5.0

Based on 23 reviews

  1. February 2026

    As someone with VERY sensitive skin, this product was absolutely amazing and so soft, gentle yet effective for my skin. It left my skin feeling so smooth, nourished and hydrated. I’ve always been hesitant trying new products on my fussy skin but this had to be a no-brainer, the science behind it is fantastic and you can tell Fabio has put so much care, effort and time into understanding different types of skin, even the difficult ones. Thank you Fabio 🤍

    Noor A.

  2. February 2026

    PHENOMENAL! This is criminally underrated, so I wanted to provide a indepth review from a skim therapists point of view.... 💦 Glycerin, propanediol, butylene glycol, betaine, sodium hyaluronate and saccharide isomerate a plethora of proven humectants to attract and bind water to the skin to instantly hydrate, comfort, plump and smooth. ✨ Ceramide EOP, NP + AP, cholesterol, phytosphingosine and coco-caprylate/caprate, a performative skin replenishing, comforting, soothing, moisturising and TEWL slowing lipid blend. 🏅Ectoin, protects skin cells and lessens the look of stress and pollution, whilst hydrating, soothing and calming skin; definitely an underrated ingredient. 🧬 Matrixyl® Morphomics®, inci name: 'n-prolyl palmitoyl tripeptide-56 acetate'. A powerful synthetic peptide compound that stimulates our own collagen + elastin therefore lessens the appearance of fine lines/wrinkles, whilst hydrating soothing and firming skin, with an overall look of rejuvenation. ☕ Black tea ferment, a powerful / stable antioxidant loaded with probiotics that has the ability to neutralise drying, ageing and skin damaging free radicals. It's also calming, soothing, hydrating, balancing, barrier supporting, anti inflammatory and skin conditioning. 🍎 Apple stem cells (malus domestica fruit cell culture), made from rare swiss apple, it helps to hydrate, calm, replenish, lessen wrinkle depth, strengthen and 're density' the skin on a molecular level, with continued use this ingredient has some brilliant visible results. ☘️ Mirabilis jalapa extract (AKA: 'marvel of Peru' + 'Four o'clock flower') has powerful anti inflammatory and antioxidant properties, meaning it soothes irritation, lowers redness, calms stressed skin, rebalances and further defends the skin against free radical damage. All this, in one, easy to use serum; congratulations 🏆

    James J.

  3. February 2026

    I’m really impressed with this serum. It feels light, not greasy, and layers beautifully. I used it morning and night while my skin was sensitive, and it was so calming, no irritation, just comfort and a soft, healthy glow. After a few days, my skin felt stronger, smoother, and more balanced. Honestly, it feels like it could replace several steps in my routine 👌🏼.

    Sara

  4. November 2025

    This is such a lovely product! It’s got a creamy/milky texture that feels super nourishing on the skin. Skin is instantly hydrated, it’s rich without being heavy. It plays well with other products, so it’s easily incorporated into any routine. It’s a genuine multi tasking product, full of hydrating, skin boosting and skin barrier protecting ingredients which I love. If you prefer an uncomplicated routine, this is a fab option. It’s fragrance free so great for those with sensitive skin, and the packaging is gorgeous. All in all an amazing first product for the brand to launch with, can’t wait to see what comes next!

    Jacqueline T.

  5. April 2026

    This is such a great product that works to soothe and moisturize my skin. It feels so lovely when I need some extra TLC!

    Brandi Lafrance

  6. May 2026

    A unique, effective and logical alternative to every other moisturiser.

    I've been obsessed with looking after my skin since I was a teenager. I've tried everything to try and fight the inevitable signs of aging. I've tried everything that comes with a reasonable price tag that has any kind of proven results, yet the effects of all of them have been limited. I always feel like I'm having to compromise on one thing to get another. I've got fine lines and combination sensitive skin which can be prone to break outs and reactions, especially after shaving. Skin like this is hard to cater for, especially when you want to find something that is actually going to make a difference. I'm totally blown away by The Mantle. I've been using it for about 3 weeks now, and have noticed a significant different. My fine lines are noticeably reduced, my skin feels firmer yet hydrated without any weight or greasy residue. My complexion is more even, and I've found in particularly soothing and repairing after I've shaved. It's so hard to find a product that suits mens skin, especially as mens skin care always feels limited compared to womens. This definitely works well and is effective on mens skin too! I will be using this for a long time to come and can't wait to see the benefits from longer term use.

    James Tash

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@moumoujus
After using The Mantle barrier serum: calmer, even-toned skin with reduced redness
Before using The Mantle — sensitive, reactive skin with visible redness
BeforeAfter

Real Results

Visible transformation

Concern

Sensitive, reactive skin with visible redness

Result

Calmer, even-toned skin with significantly reduced redness and irritation

Routine

The Mantle applied twice daily for 6 weeks

Individual results may vary. Photos are without retouching. All results are from actual product use.

The Mantle's milky, fluid texture

What's inside

Real doses, printed on the page

Plenty of brands name their hero ingredients but not the amounts. We publish ours: 8.5% total active load, built on VEIL-3™, our three layers of hydration, barrier support and comfort.

1.5%

EctoinExtremolyte

Helps skin hold on to water and cope with everyday stress like pollution and dry air.

3%

Ceramide complexCeramides NP, AP & EOP + cholesterol

Replenishes the lipids your barrier is made of, so skin holds moisture in.

2%

Matrixyl® Morphomics™Peptide

Supports firmer, smoother-looking skin over time.

0%

FragranceOr essential oils

Nothing added for scent, which makes it kinder to reactive skin.

Free from: fragrance · essential oils · silicones · drying alcohols · parabens.

Full ingredient list (INCI)

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Who it's for

Made for skin that reacts to everything

Sensitive, reactive skin

“My skin can be quite sensitive and reactive, but since using it, it's felt much calmer, more hydrated and less irritated overall.”
Abby

Eczema-prone skin

“I've had no reaction at all where my eczema patches are.”
Christina P.

Redness-prone skin

“I have sensitive post menopausal skin with late onset rosacea and this serum is just so soothing!”
Kirsten

Irritation after shaving

“I've found [it] particularly soothing and repairing after I've shaved.”
James T.

How to use

Morning and night, in under a minute

  1. 01

    Cleanse

    Start with clean skin, morning and evening.

  2. 02

    Apply

    Press 2–3 pumps into face and neck, after any serums.

  3. 03

    Protect

    Follow with SPF in the morning. It sits well under makeup.

Skin usually feels more comfortable from the first use. A stressed barrier needs 2–4 weeks of twice-daily use, which is why the guarantee gives you 30 days.

Fabio Basile, founder of Moumoujus
Fabio Basile, founder

Our story

Everything Fabio tried on his mum's skin was too harsh. So he spent eighteen months with cosmetic chemists making the serum they couldn't find: gentle enough for reactive skin, with real doses of what matters.

Read our story

Questions, answered

Anything else? Email concierge@moumoujus.com

Is The Mantle a serum or a moisturiser?

It's a serum, light and fluid, that does a moisturiser's job. Humectants hydrate, a ceramide complex with cholesterol replenishes the barrier, and ectoin helps skin cope with stress, all in one step. Most people use it on its own, followed by SPF in the morning.

Is it suitable for sensitive, eczema-prone or redness-prone skin?

That's who it's made for. There's no fragrance, no essential oils, no silicones and no drying alcohols. Customers with eczema-prone and rosacea-prone skin tell us it keeps their skin calm. If you have a diagnosed skin condition, patch test first and check with your GP or dermatologist.

Do barrier repair creams actually work?

A good one does, as long as it gives your barrier what it's made of: ceramides, cholesterol and fatty acids, plus humectants for water. The Mantle pairs a 3% ceramide complex with cholesterol, phytosphingosine, hyaluronic acid and 1.5% ectoin.

How long until I see a difference?

Skin usually feels more hydrated and comfortable straight away. A stressed barrier needs 2–4 weeks of twice-daily use, which is why our guarantee gives you 30 days.

What is ectoin, and is it good for eczema-prone skin?

Ectoin is a molecule made by microorganisms that survive extreme heat, salt and dryness. It helps skin cells hold on to water under stress, and it's well studied for supporting hydration in dry, easily irritated skin. The Mantle contains 1.5%.

Is ectoin better than hyaluronic acid?

They do different jobs, which is why The Mantle contains both. Hyaluronic acid draws water into the skin; ectoin helps skin hold on to it when it's under stress.

How do I use it?

Press 2–3 pumps into clean skin morning and evening, after any serums. In the morning, follow with SPF. It layers well under makeup and alongside retinol: apply the retinol first.

What is the Happy Face Guarantee?

If The Mantle isn't right for your skin, email concierge@moumoujus.com within 30 days of delivery. Send it back, even opened, and we'll refund you in full. It needs to be at least half full, we cover the return postage, and it's one refund per customer.

Is it vegan and cruelty-free?

Yes. It's vegan, never tested on animals, and made in the UK.

Where do you deliver, and how fast?

Everywhere, and delivery is always free. Orders are dispatched from Manchester within 1–2 working days; UK orders usually arrive 2–4 working days after that.

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