STEP 5 OF 8 IN THE HYDRATION RITUAL

The Dew : Marine Ferment Hydrating Serum

marine-ferment hydrating serum

A light-as-water serum that layers marine ferment, aloe, rose water, and multi-molecular hyaluronic acid to leave skin deeply hydrated, plumped, and dewy.

4.4 (49 reflections)
£40
  • Vegan and cruelty-free
  • Made fresh once you order
  • Dispatched within 2 working days
  • Free UK shipping over £75

Made fresh for you once you order · dispatched within 2 working days.

On the skin

What this bottle brings

  • 01

    Light-as-water hydration with satiny slip

  • 02

    Plumps and dews with multi-molecular hyaluronic acid

  • 03

    Supports surface smoothness with marine ferment

The Dew : Marine Ferment Hydrating Serum

Why this exists

Hydrating serums are often reduced to a single job : adding hyaluronic acid to a water base. This formula takes a broader view of what skin needs at the treatment step. Organic aloe leaf juice and organic rose flower water form the liquid foundation, so comfort and moisturisation are built into the base before the actives arrive. From there, cloudberry extract brings nutritive support, bisabolol adds calming softness, and Alteromonas ferment offers a marine active focused on surface smoothness. Hydrolysed hyaluronic acid and sodium hyaluronate work together across different depths and at the surface, helping skin hold onto water and look more settled. The result is a serum that feels airy on application but brings a more considered, layered approach to hydration.

Inside the bottle

The key actives

01

Organic Aloe Leaf Juice

Aloe Barbadensis Leaf Juice

Provides an amino-acid-rich, soothing liquid base that helps skin feel comfortable from the first layer.

02

Organic Rose Flower Water

Rosa Damascena Flower Water

Adds a botanically active water phase that supports a softer, more conditioned feel on skin.

03

Cloudberry Fruit Extract

Rubus Chamaemorus Fruit Extract

Contributes nutrient-dense botanical support with a notably rich lipid and antioxidant profile for a water-phase formula.

04

Alteromonas Marine Ferment

Alteromonas Ferment Extract

A marine active that supports surface smoothness and helps the skin look more refined with consistent use.

05

Multi-molecular Hyaluronic Acid

Hydrolyzed Hyaluronic Acid · Sodium Hyaluronate

Works at different depths to draw in water, visibly plump the surface, and leave skin feeling more hydrated.

On the skin

Light as water, with a satiny slip that appears as soon as it touches the skin. It absorbs within seconds and leaves a dewy finish rather than a tacky one. The feel is settled, cushioned, and fresh.
The Dew£40

Where this sits

Your place in The Hydration Ritual

From first cleanse to final seal, this is step 5 of 8 in the full Hydration Ritual : the lightweight serum that layers hydration and marine support.

  1. Step 1The Cloud Gentle Cleansing Foam
  2. Step 2The Mist Microbiome Face Mist
  3. Step 3The Drink Double Hydration Gel
  4. Step 4The Jelly Prebiotic Hydration Serum
  5. Step 5The Dew Marine Ferment Hydrating SerumYou are here
  6. Step 6The Plump Bouncing Serum
  7. Step 7The Veil Daily Hyaluronic Face Cream
  8. Step 8The Soak Urea & Panthenol Comfort Cream

Build it as a ritual

Build yourHydration Ritual

Add the steps you don't already use. Your bag updates in real time. Rewards apply at checkout, automatically.

The Cloud Gentle Cleansing Foam

£31

The Mist Microbiome Face Mist

£33

The Drink Double Hydration Gel

£33

The Jelly Prebiotic Hydration Serum

£36

The Dew Marine Ferment Hydrating Serum

£40

The Plump Bouncing Serum

£42

The Veil Daily Hyaluronic Face Cream

£42

The Soak Urea & Panthenol Comfort Cream

£47

Complete the ritual. Qualifying orders enjoy Complimentary Shipping, a Complimentary Candle and 10% OVESSI Reward.

Selected ritual subtotal £0
Estimated checkout total Includes The Hydration. £0

Rewards apply automatically at checkout. Complimentary Shipping over £75. Final price calculated by Shopify at checkout.

The application

How to layer this

  1. 1

    Apply after cleansing

    Use on clean skin after cleansing and any toner or mist. This is the treatment step that prepares the face for your moisturiser.

  2. 2

    Smooth a small amount

    Dispense a few drops and spread evenly over the face and neck. Pat gently until it disappears into the skin.

  3. 3

    Layer with other treatments

    If you use additional serums, apply this one according to your ritual order and allow each layer to settle before the next.

  4. 4

    Seal with moisturiser

    Follow with moisturiser to help keep the hydration in place and support a dewier finish through the day or night.

What to expect

On the skin, over time

  1. Day 1

    Skin looks immediately more hydrated and dewy after application. The surface feels settled and comfortably plump within minutes.

  2. Week 1

    Moisture feels easier to maintain through the day, with less of the dry, tight look that can build over time. The skin appears smoother and more even.

  3. Week 4

    With consistent use, skin can feel better supported and look more consistently fresh. Hydration appears steadier, with a softer, more luminous finish.

The deeper detail

The formulation, the provenance, the standard

Formulation

The base begins with Aloe Barbadensis Leaf Juice, organically sourced, delivering aloe's amino-acid-rich soothing activity from the opening. Rosa Damascena (Rose) Flower Water, organically sourced, follows : not as a fragrance but as a bioactive toner-type ingredient rich in naturally occurring phenylethanol and flavonoids. Jojoba Seed Oil, organically sourced, provides the formula's lipid-phase component, giving it a satin slip that distinguishes it from a plain gel serum.

Glycerin, Betaine, and Pentylene Glycol form the humectant foundation. Bisabolol, derived from chamomile, is included at a level where it provides genuine calming and softening to the surface : not a token inclusion. Paeonia Lactiflora (Peony) Root Extract provides additional phytochemical calming and conditioning. Rubus Chamaemorus (Cloudberry) Fruit Extract, organically sourced, contributes its exceptional antioxidant and vitamin-E-adjacent plant sterol content to the formula's nutritive profile.

Hydrolyzed Hyaluronic Acid penetrates into the upper stratum corneum for structural-level plumping. Sodium Hyaluronate operates at the surface for immediate hydration and smoothness. Alteromonas Ferment Extract and Glycolipids complete the active layer with marine-derived support for the skin's surface architecture. CI 77491 (Iron Oxides, pure mineral pigments) provide a subtle warm, healthy cast to the serum's finish without any visible colour on skin.

Provenance

A small-batch boutique skincare house, made to order. Every bottle is formulated and filled within two working days of your order, then dispatched from the fulfilment centre closest to you : our European facility for United Kingdom and European Union customers, our United States facility for North American customers. Because every bottle is bottled to order, what arrives at your door is at the peak of its actives : nothing has been sitting against light, heat, or oxygen for months. Two-day production is the price of formulation freshness, and the boutique standard we hold ourselves to.

Cruelty-free. Vegan. Gluten free. Natural certified (Ecocert COSMOS Natural).

From our community

Reviews and reflections

4.4
Based on 49 reflections
  • 28
  • 16
  • 4
  • 1
  • 0
  • Verified

    decent hydration

    First feel is nice, bit silky. Does hydrate and you get a glow, just not dramatic. Sits fine under moisturiser, doesn't mess with makeup. Works, just not magic.

    Esme V. Nottingham · Acne-prone · 45-54 · 25 Mar 2026
  • Bit steep, but decent

    Bit steep for a serum, but it does give decent hydration for the money, tbh.

    Shazia U. Portsmouth · Dry · 45-54 · 18 Feb 2026
  • love the dispenser

    Two drops does me. Feels almost watery at first then my skin looks properly hydrated, not greasy. I have a dehydrated t-zone and this sits under my cream without fuss. The little pump makes it dead easy to control. Honestly really happy with it, looks like actual skin rather than product.

    Eloise U. Glasgow · Combination · 35-44 · 14 Feb 2026
  • Verified

    glow looks real

    One of the few serums where the glow actually looks like skin, not product. Surface smoothness is noticeably better and it lasts through the day. I use it morning and evening now.

    Lily U. Boston MA · Normal · 25-34 · 6 Feb 2026
  • Verified

    light but polished

    Texture is light as water but the finish is more polished than thin. Has a satin glide, skin looks less rough after using it consistently. Behaves well under my evening moisturiser.

    Finn D. London · Combination · 45-54 · 2 Feb 2026
  • Verified

    works under cream

    Three drops after cleansing, press in, follow with cream. Vanishes fast, leaves skin dewy not wet. Face looks less dull.

    Edith J. Nottingham · Mature · 25-34 · 30 Jan 2026
  • Verified

    smoother surface

    Few drops on damp skin, absorbs quickly then leaves a dewy look that actually stays. Bought it for the marine bit and yeah, that smoother feel is exactly what I wanted.

    Jessica D. Seattle WA · Acne-prone · 45-54 · 22 Jan 2026
  • Verified

    pricey but decent

    Pricey, really, though it does seem decent value once you factor in how it eases that post-cleanse tightness.

    Ayesha P. Portsmouth · Sensitive · 25-34 · 16 Jan 2026
  • nice glow

    Dewy enough. Wish it lasted longer on dry days.

    Sam L. Liverpool · Sensitive · 55+ · 23 Dec 2025
  • Verified

    not flimsy

    Sounds like it'd be flimsy but it's not. Enough slip to feel purposeful, skin settles with a dewy finish that lasts. Works well under a richer cream.

    Sarah J. Dublin · Normal · 25-34 · 21 Dec 2025
  • Verified

    calmer skin

    Texture is almost like water but enough substance to spread comfortably. I use three drops before moisturiser and skin looks calmer and more hydrated after. Only reason it's the full five is I need to use it consistently to see the best effect, can't skip days really.

    Leila I. Austin TX · Dehydrated · 25-34 · 2 Dec 2025
  • Verified

    Cheeks look brighter

    Didn’t expect the serum to leave cheeks looking brighter and it keeps skin comfortable until lunch.

    Vilja O. Madrid · Combination · 35-44 · 29 Nov 2025
  • Verified

    short-lived

    Pleasant formula but I expected more from a hydrating serum. Gives smoothness then my cheeks want extra cream quite quickly. Fine in summer, less convincing when it's dry.

    Maya T. Paris · Normal · 35-44 · 13 Nov 2025
  • Verified

    too light

    Disappears quick but not enough for very dry skin. Need heavier layer by midday.

    Imogen D. Austin TX · Mature · 35-44 · 31 Oct 2025
  • Verified

    solid daytime serum

    Feels gentle, absorbs in seconds. I like the smoother finish though I expected a bit more visible plumpness. Still a solid daytime serum, does the job.

    Henry B. Manchester · Oily · 25-34 · 24 Oct 2025
  • Verified

    Midday shine down

    Less shine by lunch, layers cleanly.

    Sylvie C. Lyon · Acne-prone · 18-24 · 11 Oct 2025
  • Verified

    inconsistent

    Clean absorption, dewy finish. Effect is inconsistent though. Some days I look fresher, other days still need more.

    Florence G. Berlin · Dehydrated · 18-24 · 20 Sep 2025
  • Verified

    obsessed

    One drop is enough. Dewy rested look, never sticky.

    Liam L. London · Dehydrated · 35-44 · 19 Sep 2025
  • Verified

    Fresh glow review

    Applied this serum and it feels super fresh and leaves my skin looking brighter with a finish I really like.

    Josie A. Phoenix AZ · Normal · 55+ · 9 Sep 2025
  • Verified

    Layered glow start

    Layering note first, then serum, then cream and my complexion stays more even with a fresh finish.

    Joaquim G. Porto · Dehydrated · 55+ · 5 Sep 2025
  • Verified

    didn't last

    Liked the texture at first, water-like and gentle. Issue is the finish didn't stay settled on my skin for long so I kept reaching for more. Wanted a bit more lasting plumpness, to be honest. It's pleasant, just runs out of steam too fast for my liking.

    Marta O. Newcastle · Dry · 45-54 · 25 Aug 2025
  • Verified

    Fewer Doubts

    Looked more rested, not shiny. Sensitive skin handled it well.

    Sebastian G. Portland OR · Dehydrated · 55+ · 23 Aug 2025
  • Verified

    box feels premium

    Box feels premium and serum has richer texture without heaviness, nice on skin.

    Emanuela P. Naples · Acne-prone · 35-44 · 22 Aug 2025
  • Featherweight Feel

    Wasn't sure to start with, but it is really nice. Featherweight on the skin and great for keeping cheeks looking smooth and hydrated.

    Finley U. Pittsburgh PA · Sensitive · 25-34 · 18 Aug 2025
  • face looks awake

    After a week my face stopped looking flat, that was the biggest change. The serum sits well beneath my moisturiser and I like that it's built around aloe rather than feeling like plain water. Definitely more conditioned finish now, looks less tired basically.

    Elliot M. York · Dry · 18-24 · 5 Aug 2025
  • Verified

    refined surface

    Built on aloe not heavy gel. Satiny slip is lovely. Skin surface looks refined.

    Maeve F. Oxford · Oily · 45-54 · 13 Jul 2025
  • Verified

    Gentle serum review

    Kept it simple, this serum is alright in truth. It spreads easy and the scent is soft, quite pleasant really. Hydration is there, but on my skin it stays on the modest side, so not a massive sort of result. I did like having it on, just wish the moisture hung about longer and felt a bit fuller.

    Flavia Y. Amsterdam · Acne-prone · 55+ · 8 Jul 2025
  • Verified

    Consistent moisture

    honestly, my skin feels a lot less bothered by dry areas.

    Eliana J. Phoenix AZ · Mature · 45-54 · 5 Jul 2025
  • Verified

    brilliant for tight skin

    My skin gets tight in cold weather and this has been brilliant. Immediate comfort, keeps it calm. Layers neatly under cream, never patchy.

    Tilly U. Atlanta GA · Mature · 45-54 · 30 Jun 2025
  • Verified

    reduces crepey look

    Does help reduce that crepey look by the time I apply cream. Knocked off one point because I prefer slightly more cushioned feel.

    Bisi J. Edinburgh · Dehydrated · 35-44 · 22 Jun 2025
  • Verified

    Portable and handy

    Tucked in my wash bag, it feels lighter than expected, adds hydration under cream and leaves no greasy shine.

    Bryan U. Los Angeles CA · Sensitive · 25-34 · 4 Jun 2025
  • go through it fast

    Water-light but not flimsy. Sinks away quick, surface feels smoother. My only gripe is I go through it faster than expected from 30ml.

    Hazel R. Birmingham · Dehydrated · 55+ · 29 May 2025
  • Verified

    polished sheen

    Feels sophisticated. Leaves polished sheen not oily film. Would buy again no hesitation.

    Clara D. Bath · Dehydrated · 45-54 · 5 May 2025
  • Verified

    not sticky

    Different feel to other HA serums. Disappears fast, finish stays plump for hours.

    Sam V. Newcastle · Acne-prone · 25-34 · 4 May 2025
  • Verified

    need cream in winter

    Enjoy the silky slip and the hydration. Only reason i'm not fully sold is I need cream on top in winter. For warmer months though, excellent.

    Nora E. Brighton · Acne-prone · 35-44 · 24 Apr 2025
  • Lasts longer between washes

    Lasts longer between washes, with cheeks feeling less tight after cleansing and the result hanging on through moisturiser.

    Naila G. Edinburgh · Dry · 55+ · 22 Mar 2025
  • lasting moisture

    Comes off clean, leaving my skin less tight and nicely hydrated, with a light feel under moisturiser.

    Sera N. Newcastle · Sensitive · 35-44 · 20 Mar 2025
  • Verified

    lasts well through day

    Lasts-long hydration keeps skin comfortable through the day, with no tight feeling by midday.

    Sana I. Brighton · Normal · 55+ · 15 Mar 2025
  • Verified

    Quick serum win

    Three drops and it is gone in seconds. My skin looks brighter, not just damp. Works fine under moisturiser, which is more than I can say for a lot of serums.

    Amelia P. Cardiff · Sensitive · 35-44 · 18 Feb 2025
  • Verified

    consistent hydration

    Less shine, smoother texture, very lightweight.

    Sonja B. Amsterdam · Mature · 25-34 · 15 Feb 2025
  • Verified

    well-made

    Nothing flashy, just very well-made. Absorbs within seconds, smooth glide, layers cleanly. Skin looks a little fuller with regular use.

    Trent P. Seattle WA · Dry · 45-54 · 12 Feb 2025
  • Fragrance and moisture

    Fragrance is nice, but hydration feels only partly there.

    Emil E. Hamburg · Oily · 25-34 · 11 Feb 2025
  • subtle glow

    Bought it for the cloudberry and marine bit, those are the parts I notice most. Skin looks fresher but the glow is more subtle than expected. Still very usable though, disappears quickly and behaves under cream.

    Tess M. Liverpool · Acne-prone · 45-54 · 10 Feb 2025
  • Verified

    Evening serum

    Feels promising, though not fully certain. Went on easily and left skin comfortable by later.

    Arvid S. Helsinki · Sensitive · 25-34 · 31 Jan 2025
  • night cream swap

    At night after before bed, I swapped to this on my face and neck. Richer than my old one, a bit slow to sink in, but my combination skin liked it.

    Johanna H. Brussels · Combination · 45-54 · 2 Jan 2025
  • Verified

    gift for my mother

    Bought as a present for my mother and she said skin felt more comfortable with it.

    Klara B. Milan · Dehydrated · 45-54 · 30 Dec 2024
  • smoother by end of day

    Use it after cleansing before cream. Feels soothing straight away and gives a smoother look by end of day. Prefer it because the glow is noticeable without being shiny.

    Imogen E. Edinburgh · Combination · 35-44 · 29 Dec 2024
  • Easy on skin

    Feels gently light on the face and settles in fast, so it suits me better than richer serums. Hydration is decent, though I could do with a bit more and the lack of strong scent is a very bonus.

    Alice B. Belfast · Normal · 45-54 · 19 Dec 2024
  • less tired

    Gentle rose note. Two drops, absorbs so quick. Skin looks less tired round mouth and cheeks.

    Mia K. Denver CO · Acne-prone · 25-34 · 16 Dec 2024
The Dew£40

Every OVESSI order is prepared once you place it. Your order is filled, sealed and labelled for you, then dispatched within 2 working days. Nothing waits on a warehouse shelf.

  • Made fresh
  • 2-day dispatch
  • UK 3 to 7 / EU 5 to 10 / US 2 to 5 days

In case you wondered

Frequently asked

What skin type is this serum best for?
It is suitable for all skin types, especially skin that wants more hydration without a heavy finish. The texture is light enough to fit easily into both morning and night rituals.
Will this feel sticky on skin?
No. It absorbs within seconds and is designed to leave a dewy, settled finish rather than a tacky one.
Can I use this morning and night?
Yes. The formula is designed for both morning and night use as part of the hydration step.
Where does this sit in my ritual?
Use it after cleansing and toning or misting, and before moisturiser. It is the serum step in the Hydration ritual.
Does this replace moisturiser?
No. It is a hydrating serum, so it works best underneath moisturiser to help layer in water and support a more plump finish.
When will my order arrive?
We start preparing your bottle once your order is placed and dispatch within 2 business days. From dispatch, delivery is UK 3 to 7 business days, EU 5 to 10 business days, US 2 to 5 business days.
The Dew£40

Small batch. Filled for you. Made in EU and US.

Vegan · Cruelty-free · Full INCI on every product · hello@ovessi.com