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Dyson Chitosan™ Post-style serum
Holds and hydrates your end style
2x longer hold.¹ Even in high humidity.²
Up to 50% less frizz.¹
For instant definition while maintaining shine.
Hold and hydrate your end style, with instant shine and definition. Dyson Chitosan™ Post-style serum has been developed for use on finished styles on all hair types, to give 2x longer hold¹, without crunch, brittleness or residue. For hair that looks and feels moisturised, soft and smooth. Paraben-free, vegan formulation.
Dyson Triodetic™ technology, powered by our key ingredient, chitosan, creates flexible, lightweight bonds that support the hair, strand by strand. Our formula protects your style from unwanted frizz, even in high humidity.²
For use on dry, styled hair. Work through the hair with your fingers to smooth, define and enhance your style.
Use alongside Dyson Chitosan™ Pre-style cream to prime and define your styles, with flexible hold.
Flexible all-day hold.
Up to 50% less frizz.¹
Tested at 80% humidity.
Instant shine and definition.
Hair feels hydrated and moisturised.
With hyaluronic acid and amino acid blend.
Precisely formulated with:
Chitosan
Our powerful key ingredient, derived from oyster mushrooms. Rigorously tested to find the optimum percentage for all-day flexible hold, for a formula with natural movement, without the crunch.
Hyaluronic acid
This well-known skincare ingredient, known for its moisturisation properties, is blended into our formula with two different molecular weights.
Amino acid blend
Enriched with a blend of 12 amino acids.
Full ingredients:
Aqua (Water/Eau), Dimethicone, Polyglyceryl-6 Stearate, Glycerin, Phyllostachys Bambusoides Extract, Chitosan, Hydrolyzed Hyaluronic Acid, Panthenol, Leuconostoc/Radish Root Ferment Filtrate, Caesalpinia Spinosa Gum, Sclerotium Gum, Helianthus Annuus (Sunflower) Seed Oil, Sodium PCA, Arginine, PCA, Glycine, Alanine, Serine, Valine, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, Sodium Hyaluronate, Cetearyl Alcohol, Polyglyceryl-6 Behenate, Lactic Acid, Sodium Lactate, Tocopherol, Aspartic Acid, Sodium Hydroxide, Parfum (Fragrance), Phenoxyethanol, Sodium Benzoate, Potassium Sorbate, Citric Acid, Limonene, Citronellol, Citral.
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Dyson Chitosan™ Post-style serum

Use Post-style serum on your end style, for flexible hold with shine and definition.
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Pump
Remove lid. Position the pump mid-palm and push down to dispense one dose of product. We recommend starting with 1–2 pumps, before adding more as needed.
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Sheer
Sheer gently between your palms.
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Smooth
Work through the hair with your fingers to smooth, define and enhance your style.
The story of chitosan
[chi-to-san]: A complex macromolecule, derived from oyster mushrooms – and the key to our flexible hold.
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Natural strength
Chitosan is an essential component found in the cell walls of mushrooms, giving the fungi its billowing, cloud-like shape.
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Flexible hold
This complex macromolecule helps create flexible bonds that support hair, strand by strand, as a foundation of our Dyson Triodetic™ technology.
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Real results
Hold. Movement. Shine. Dyson Chitosan™ formulations give your style 2x longer hold¹, while maintaining a natural look and feel.
Core benefits
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Dyson Triodetic™ technology
Powered by chitosan. Locks in flexible styles, strand by strand.
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Amino acid blend
Enriched with a blend of 12 amino acids.
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Humidity shield
Weightless protective shield in up to 80% relative humidity.²
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Refill and reuse
All of our full-size formulation products are refillable and built to last. Your used cartridge can be recycled at home.
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Results engineered for all hair types
Create the look
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Naturally wavy hair results
Model uses Pre-style cream Straight to wavy rich conditioning on her naturally wavy hair. Styled with Dyson Airwrap™ multi-styler with 20mm Airwrap™ barrel. Finished with Dyson Chitosan™ Post-style serum.
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Naturally wavy hair results
Model uses Pre-style cream Straight to wavy light conditioning on her naturally wavy hair. Styled with Dyson Supersonic Nural™ hair dryer and Dyson-designed brush. Finished with Dyson Chitosan™ Post-style serum.
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Naturally straight hair results
Model uses Pre-style cream Straight to wavy rich conditioning on her naturally straight hair. Styled with Dyson Airstrait™ straightener. Finished with Dyson Chitosan™ Post-style serum.
Create the look
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Naturally curly hair results
Model uses Pre-style cream Curly to coily light conditioning on her naturally curly hair. Styled with Dyson Airwrap™ multi-styler with Large volumising brush. Finished with Dyson Chitosan™ Post-style serum.
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Naturally curly hair results
Model uses Pre-style cream Curly to coily light conditioning on her naturally curly hair. Styled with Dyson Supersonic r™ hair dryer with the Diffuser attachment. Finished with Dyson Chitosan™ Post-style serum.
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Naturally coily hair results
Model uses Pre-style cream Curly to coily rich conditioning on her naturally coily hair. Styled with Dyson Supersonic Nural™ hair dryer. Finished with Dyson Chitosan™ Post-style serum.
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Frequently asked questions
How do I use Dyson Chitosan™ Post-style serum?
Dyson Chitosan™ Post-style serum should be applied on dry, styled hair to define your look.
Start with one or two pumps, sheer gently through palms and work through the hair with your fingers to smooth, define and enhance your style. Add more product as needed.
How many pumps of product should I use?
Less is more with our Post-style serum. We recommend starting with one or two pumps, building as needed for your hair.
Our Dyson-engineered applicator is rigorously tested to deliver the same amount pump after pump, so once you’ve established the right amount for your hair, you can count on your dosage, every time.
What’s the difference between Dyson Chitosan™ Post-style serum and the Dyson Chitosan™ Pre-style cream?
The Dyson Chitosan™ hair styling range is designed to prime and define your styles, for flexible all-day hold.¹ You can use the products together or separately, depending on your styling routine.
Use Dyson Chitosan™ Pre-style cream before styling, on towel-dried hair, to prime, hold and condition. Dyson Chitosan™ Post-style serum is designed for use on dry, styled hair to define, hold and hydrate your look. Each product has a range of key ingredients that support additional benefits to the hair, including less frizz, a conditioned feel, natural movement, smoothness and shine.
What styles is the Dyson Chitosan™ Post-style serum best used on?
Dyson Chitosan™ Post-style serum has been developed for use on finished styles on all hair types, to give 2x longer hold¹, without crunch, brittleness or residue, for hair that looks and feels moisturised, soft and smooth. The Post-style serum is great for reducing frizz for a smooth finish, especially on straighter styles, or you can use the serum on natural curls and waves to add texture and definition.
Will it work for my hair?
The Dyson Chitosan™ Post-style serum has been engineered for all hair types to help your finished style feel moisturised, soft and smooth, with two-times longer hold.¹ It’s designed to be used on your finished styles.
What is the key ingredient?
Chitosan is the hero ingredient in our Dyson Chitosan™ hair styling range. Chitosan is a complex macromolecule derived from oyster mushrooms. This complex macromolecule helps create flexible bonds that support hair strand by strand, for flexible all-day hold¹, even in high humidity.² It’s the foundation of our Dyson Triodetic™ technology. Our key ingredient is also supported by oils for a formula that helps condition the hair surface, reducing frizz and giving a soft, shiny finish.
Are there refills?
Yes. All our full-size formulation packaging is refillable. When you’re approaching the end of
your original product, simply order a refill and follow the instructions on the cartridge to replace.
Your used cartridge can be recycled at home (check local guidance). Buying a refill generates 76% less waste than buying a new parent pack (product packaging only).
- 1 vs. untreated hair.
- 2 Tested at relative 80% humidity.