Best for: All hair types looking to smooth, define and finish a hairstyle with flexible hold, hydration, shine and frizz control.

What is Dyson Chitosan™ Post-Style Serum?

Dyson Chitosan™ Post-Style Serum is a weightless finishing hair serum designed to be applied to dry, styled hair to hold, hydrate and define your finished look.

Powered by Dyson Triodetic™ technology and chitosan, the formula creates flexible, lightweight bonds that support hair strand by strand. It provides 2x longer hold¹, while helping maintain natural movement without crunch, brittleness or residue.

The serum also delivers instant shine and definition while helping hair feel moisturised, soft and smooth.

Who is it best for?

Dyson Chitosan™ Post-Style Serum is suitable for all hair types and is ideal for:

• Smoothing and defining finished hairstyles
  
• Adding instant shine
  
• Providing flexible hold without crunch
  
• Reducing unwanted frizz
  
• Adding definition to curls and waves
  
• Smoothing straighter hairstyles
  
• Hair that needs lightweight hydration after styling

It can be used across straight, wavy, curly and coily hair.

What problem does it solve?

Finished hairstyles can lose definition and develop unwanted frizz, while some traditional hold products can leave hair feeling stiff or brittle.

Chitosan + Hyaluronic Acid + Dyson Triodetic™ technology → flexible hold, hydration and frizz control → smoother, softer, more defined hair with natural movement and shine.

Key Ingredients & Technology:

• Chitosan, The hero ingredient in Dyson's styling range, chitosan is derived from oyster mushrooms. It powers Dyson Triodetic™ technology, helping create flexible bonds that support hair strand by strand for flexible hold with natural movement.
• Hyaluronic Acid, The serum contains Hyaluronic Acid in two different molecular weights. Dyson includes this ingredient for its moisturising properties, helping hair feel hydrated and moisturised.
• Amino Acid Blend, Enriched with a blend of 12 amino acids. Dyson states that its amino acid blend is known to help repair signs of surface damage.
• Dyson Triodetic™ Technology, Powered by chitosan, Dyson Triodetic™ technology creates flexible, lightweight bonds that support individual hair strands, helping lock in styles while maintaining natural movement.

Benefits:

• 2x longer hold¹
  
• Up to 50% less unwanted frizz¹
  
• Flexible all-day hold
  
• Tested at 80% relative humidity²
  
• Instant shine and definition
  
• Helps hair feel hydrated and moisturised
  
• Helps leave hair soft and smooth
  
• Maintains natural movement
  
• No crunch, brittleness or residue
  
• Suitable for all hair types
  
• Contains Hyaluronic Acid and a 12-amino-acid blend
  
• Paraben-free
  
• Vegan formulation
  
• Full-size packaging is refillable

How to Use:

Apply to dry, styled hair as the finishing step in your styling routine.

Start with 1–2 pumps.
Gently sheer the serum between your palms.
Work through the hair with your fingers to smooth, define and enhance your finished style.
Add more product as needed.

For straight, sleek styles, smooth the serum through the lengths. For curled or naturally curly styles, use your fingers to work it through and define the curls.

Why Choose Dyson Chitosan™ Post-Style Serum?

• Product type: Finishing hair serum
  
• Best for: Hold, hydration, definition, shine and frizz control
  
• Hair types: All hair types
  
• Application: Dry, styled hair
  
• Hold: Flexible, all-day
  
• Hold claim: 2x longer hold¹
  
• Frizz claim: Up to 50% less frizz¹
  
• Humidity: Tested at 80% relative humidity²
  
• Key ingredient: Chitosan
  
• Key technology: Dyson Triodetic™ technology
  
• Hydrating ingredient: Hyaluronic Acid
  
• Additional ingredients: 12-amino-acid blend
  
• Paraben-free: Yes
  
• Vegan: Yes
  
• Refillable: Yes

Is Dyson Chitosan™ Post-Style Serum Right for Me?

Choose this if: you want a finishing serum that combines flexible hold with hydration, shine, smoothing and definition rather than simply adding shine to the hair.

It works across all hair types: use it to help create a smoother finish on straighter styles or to add texture and definition to waves and curls.

Frequently Asked Questions:
What does Dyson Chitosan™ Post-Style Serum do?

It is designed to hold, hydrate and define finished hairstyles, while adding instant shine and helping reduce unwanted frizz.

Do I use Dyson Chitosan™ Post-Style Serum on wet or dry hair?

Use it on dry, already-styled hair. Dyson recommends starting with 1–2 pumps and adding more as required.

What is the difference between Dyson Chitosan™ Pre-Style Cream and Post-Style Serum?

The Pre-Style Cream is applied to towel-dried hair before styling to prime, hold and condition. The Post-Style Serum is applied to dry hair after styling to define, hold and hydrate the finished look.