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Hair samples on washing line

The engineering story

A 1,010-mile journey. To understand the science of hair.

James Dyson holding motor

"Hair dryers shouldn’t damage hair. With our technology, we knew we could do better."

James Dyson

Testing the water.

To understand how to look after hair, we dug deeper into its hydrophobic properties. We found that damaged hair absorbs water more quickly than healthy hair, which can weaken it. 

Play the video: Find out about the science behind the Dyson supersonic hairdryer
Vintage and competitor hair dryers

Hair dryers haven’t changed much since the ‘60s.

Conventional hair dryers were being held back by big, bulky motors. And with extreme heat for styling, could cause irreversible damage to hair. We weren’t willing to accept convention.

Dyson Supersonic hair dryer disassembled in lab

1,010 miles of hair. 103 specialists. One purpose.

Straight, wavy, coiled, curly. 1,010 miles of real hair went through our purpose-built labs. Our specialist team of trichologists, engineers and stylists looked at everything from airflow dynamics to hair’s cellular structure, to understand thermal, mechanical and chemical damage, and their effect on hair health.

Hair strand under microscope

Damage can be invisible. But not to us.

We found that damaged hair doesn’t always look it. Over time, extreme heat affects the cortex, making hair weak, brittle and easier to break. Sustained cuticle damage drastically reduces hair’s ability to reflect light, affecting shine. We had to find a way to dry without extreme heat.

Dyson Supersonic hair dryer technology cutaway

Staying cool.

Temperatures above 150°C cause irreparable damage, so we developed Intelligent Heat Control. Adding a glass bead thermistor in front of the heating element meant we could measure the exit airflow temperature 20 times every second, and prevent temperatures exceeding 150°C.

Dyson Supersonic hair dryer side view lab test

Powerful airflow. Controlled heat.

We found that effective – and safe – drying requires controlled heat balanced with powerful air. Only the Dyson digital motor V9 had the power to dry hair fast, without relying on extreme heat. And because it’s so small, it could fit in the handle, allowing a better balance in the hand.

Dyson Supersonic hair dryer prototypes

Fail. Fail again. Fail better.

We built 600 prototypes, 599 of them failures. But each one taught us something: how we could make it better. Every iteration was an improvement. Every prototype closer to a revolutionary invention.

Million GBP invested in hair research

Miles of hair tresses analysed

Months in development

Dyson engineers assigned to the project

Hair dryer front view

Dyson Supersonic™ hair dryer.

Engineered from the inside out, with hair science at its core, the Dyson Supersonic™ hair dryer redefines haircare. Four years of development have put an end to extreme heat damage. For good.

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Direct from Dyson

Price match promise

Dyson Price Promise.

Our prices are checked and matched daily, so you can be confident that you're getting the best price direct from Dyson.

-  If you find a lower price at qualifying retailers within 7 days of purchase, we’ll refund the difference.

-  Contact our Customer Service team on 0800 298 0298 to get started.

View full terms and conditions.

Free scheduled delivery

Free next-day delivery

On orders placed before before 8pm seven days a week.

Scheduled delivery

Pick a day and time slot that suits you. Free options available.

Click and collect

We’ll deliver your machine to a pick-up location of your choice.

Please note that spares, tools and accessories are dispatched separately and will be delivered within 3-5 days.

Money back guarantee

Money back guarantee.

We offer a 35-day returns policy, in case you change your mind (on vacuums, hair care, lighting, purifiers, fans and heaters only).

-  You may cancel up to 35 days after receiving your machine.

-  Contact us on 0800 298 0298 or to cancel.

See our returns policy for further details.


2-year or 5-year guarantee.

We don't stop caring about our machines once they're yours. We offer a guarantee on parts and labour.

5-year guarantee on:

-  Upright and cylinder vacuums.

2-year guarantee on:

-  Cordless vacuums;

-  Hair dryers;

-  Purifiers, fans and heaters.

Auto registration

Register your guarantee automatically when buying direct.

Pay monthly

Spread the cost to suit your budget

-  Choose a monthly instalment plan with PayPal Credit up to 12 months.

-  Interest rate of either 0% p.a. or 14.9% p.a. depending on the product.

Apply online at checkout

-  Select instalments at checkout and apply with simple steps.

-  Minimum order £199.

Representative example

Using PayPal Credit, a £1,200 purchase split over 12 monthly payments:

-  At 0% p.a. would cost £100.00 per month.

-  At 14.9% p.a. would cost £107.73 per month.