Flexible Duo
Flexible Duo shampoo 250 ml & serum 100 ml MARTINSSON KING
Flexible Duo shampoo 250 ml & serum 100 ml MARTINSSON KING
shampoo 250 ml & serum 100 ml
550.00 SEK500.00 SEK


Even fine hair needs a moisture boost sometimes, especially when your hair is flat and colour treated. Hydrating Infusion serum blends perfectly to restore flexibility and bounce to dry hair without losing the volume at the roots where you need it.


Suitable forfine, flat, oily root or dry ends.

Deep and gentle cleanse: Create a fresh and lasting feeling. Perfect for finer, thinner hair types and scalps that can easily get greasy.

Instant moisture and flexibility: Get healthy bounce and lustre in all hair types with this unique dual-function serum.

Feel your hair coming back to life: Give energy and youthful bounce to tired hair.

Weightless hydration: Boost the natural health and moisture of your hair without weighing it down. 

Create the perfect result for you: You can also blend a few drops of this serum with the shampoo, in the palm of your hand, to make it even more moisturising.


✔ Made in Sweden. 

✔ 100% vegan, sustainable ingredients.

✔ Recommended by Green Salon™️.

✔ 5x climate compensated through Carbon Footprint.

✔ 30 day change/refund guarantee.



Simply add a pump or two of the serum and blend it together with the shampoo in the palm of your hand before applying. Alternativly, you can add a few pumps of serum into your hair after washing and leave it in for blowdrying. 


Uniquely blended from pure ingredients for Martinsson King in Grasse (France), our signature fragrance evokes the essence of sophisticated freshness that lingers lightly throughout the day, without interfering with your own scent.
Top notes: pink pepper / ginger / cardamom 
Middle notes: cedar wood / violet 
Base notes: white sandalwood / vanilla / frankincense

Essential Cleanse Shampoo

Cocamidopropyl BetaineCleansing & conditioning agent made from coconut oil.
Sodium Lauryl SulfoacetateA cleansing agent derived from coconut oil.
Sodium Lauroyl SarcosinateCleansing and foaming agent that enhances the suppleness and sheen.
GlycerinA naturally sourced moisturiser for hair and scalp.
Coco-GlucosideNatural cleansing agent derived from coconut oil and fruit sugar.
Decyl GlucosideMild, plant-derived cleansing agent.
Acrylates CopolymerA stabiliser/thickener for viscosity.
Glycol DistearateNaturally occurring fatty acid to enhance the product texture.
Tetrasodium Glutamate DiacetateNaturally derived, improves the efficacy of preservatives and antioxidants.
Polyacrylamidopropyltrimonium ChlorideA conditioning polymer.
Polyquaternium-113Shields colour-treated hair for long lasting colour retention.
Sodium ChlorideSalt
Sodium BenzoateCommon eco-preservative.
Citric AcidNatural preservative.
Potassium HydroxideSurfactant to help wash away excess oil and dirt from the skin.
Cetrimonium ChlorideAnti-static ammonium salts

Hydrating Infusion serum

GlycerinNaturally sourced moisturiser for hair and scalp.
Sodium PCANaturally occurring humectant derivative of amino acids.
Polyacrylamidopropyltrimonium ChlorideSubstantive and durable conditioning polymer.
HydroxyethylcellulosePlant-derived amino acid used as a preservative.
PanthenolMoisture molecules that penetrate hair shaft and binds moisture from within.
Polysorbate 20Emulsifier, stabiliser of fragrance.
Citric AcidCitrate salt
Tetrasodium Glutamate DiacetateNaturally-derived, improves the efficacy of preservatives and antioxidants.
Sodium BenzoateCommon preservative to use for eco products.


Essential Rinse conditioner conditioner 250 ml (8.4 fl.oz) MARTINSSON KING
275.00 SEK
JBF Volume dry finishing spray spray 300 ml (10.1 fl.oz) MARTINSSON KING
275.00 SEK
Volume Infusion serum serum 100 ml (3.4 fl.oz) MARTINSSON KING
275.00 SEK

Customer Reviews

Based on 418 reviews
Irina Zetterqvist
Riktigt bra kombo!

Väldigt nöjd med denna kombo, Vital Cleanse and Rinse. Håret blir mjukt, glansigt och lockarna mer definierade, härlig doft. Gillar också att man inte behöver ta så mycket.

Eva Lena Nylander


Ingela Lindström

Håret blir fint men kan klia på vissa ställen i hårbotten.
Tappar också en del hårstrån.

Linn Löthman
Volume infusion serum

Hej! Jag upplever också att volume i fusion serum gör mitt hår fett? Gör jag fel? Behöver också använda jättemycket av volymsprayen om det ska hända något alls efter styling.

Gunnel Nilsson

Hej på er! Jag har använt era produkter sedan start och varit mycket nöjd. Vid den senaste beställningen med bl.a. Volume infusion och Smoothing infusion, blev jag konfunderad. När jag använde dem första gången, gjorde jag 4 tryck, precis som på de gamla förpackningarna. Resultatet blev verkligen inte positivt. Håret blev fruktansvärt fett. Försökte spraya med torrschampot - utan resultat. Fick tvätta om håret och uteslöt de båda produkterna, vilket blev bra.
Idag när jag tvättade håret, gjorde jag endast två tryck på de båda produkterna men resultatet blev även denna gång, ett tungt fett hår som ser ovårdat ut.
Så jag undrar vad som är fel, för så här vill jag inte ha det.
Med vänlig hälsning
Gunnel Nilsson