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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. 

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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 euros 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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Dyson Supersonic™ hair dryer on a bed

Give guests an exclusive styling experience, in the comfort of their own room.

Direct from Dyson

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Dyson Price Promise

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Free next-day delivery

Free next-day delivery

Orders placed before 4pm will be dispatched same day for next working day delivery across Republic of Ireland (excluding Northern Ireland) subject to availability.

Spares, tools and accessories are dispatched separately and will be delivered within 3-5 days.

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You may cancel your order at any time up to 14 days after receiving the goods by calling us on 01-475-7109 or emailing askdyson@dyson.ie

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14-day money-back guarantee

14-day money-back guarantee

We offer a 14-day returns policy, in case you change your mind.

Vacuums, hair care, lighting, purifiers, fans and heaters only

1. If you change your mind, you may cancel your order up to 14 days after receiving your machine.

2. To cancel, please contact us by:

    Phone: 01-475-7109

    Email: askdyson@dyson.ie

3. Our Customer Service team will then arrange to collect your machine, free of charge.

2-year guarantee

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We offer a guarantee on parts and labour for five years on our upright and cylinder vacuums.

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