If you try one beauty product this week, make it a dry shampoo that defies all expectations

I had no idea dry shampoo could be this good - even I'm surprised

a marble backdrop with a circular image of a hand with red fingernails holding a white and purple bottle of K18 Airwash Dry Shampoo with lettering below reading sunday service and an image of fiona mckim with blonde hair and a black t shirt on, smiling
(Image credit: Future / Fiona McKim)

For some types of beauty product, the gap between best in class and bottom of the bargain bin is vast. For others, not so much.

I've spent years thinking that even the best dry shampoo wasn't a million miles away from a 'this'll do' bottle picked up for a few quid in airport Boots. I've tried variations with nicer smells and textures, sure, but ultimately they all do their job in much the same way.

And it's a fine job they do, too. But I couldn't imagine a world where it made sense to spend a lot of money on dry shampoo. And then there was AirWash.

Why this expectation-defying dry shampoo is my beauty buy of the week

I don't say dry shampoo is much of a muchness to be disparaging. What I mean is, they all use micro-fine powders to absorb oil and give the appearance of washed hair. And if it ain't broke, why fix it?

I use and like many of these formulas, but they have limitations. The powder tends to build up, so after a few days it can look obvious, especially in fine or dark hair, and feel claggy on the scalp.

This is counterintuitive for a product designed to replicate cleanliness. But it always felt like a decent trade for the initial benefits, and I assumed this was just how it had to be. To which the makers of my favorite hair repair mask clearly said, hold my beer, I'm off to the lab.

An image of a hand with red fingernails holding a white and purple bottle of K18 Airwash Dry Shampoo against a beige background, in between two images of fiona mckim with blonde hair and a black t shirt on, smiling - one image with oily hair and flat roots, the other with fresh-looking hair

These photos were taken about a minute apart - the results on my lank day three hair speak for themselves

(Image credit: Future / Fiona McKim)

The other thing - you've probably noticed - is that this is not a cheap product. £48, what can I say?

Well, I can say it's not an aerosol, so you'll use less of it and waste nothing. You can recoup some expenditure by using your best shampoo and conditioner less often, and making pro blow-dries last longer if you get those. Er, I guess there's an electricity saving on using your hair dryer or best hair straighteners less too? Every little helps!

There's also a smaller 47ml version (which I'm holding in the photos above) that would make a cost-effective way to see what AirWash can do. I'm not too proud to admit this product has schooled me in what dry shampoo is capable of - and really should be tried to be believed. Sounds good? Great! Let's chat next Sunday.

Fiona McKim
Beauty Editor, womanandhome.com

As woman&home's Beauty Channel Editor, Fiona Mckim loves to share her 15+ years of industry intel on womanandhome.com and Instagram (@fionamckim if you like hair experiments and cute shih-tzus). After interning at ELLE, Fiona joined woman&home as Assistant Beauty Editor in 2013 under industry legend Jo GB, who taught her to understand ingredients and take a cynical approach to marketing claims. She has since covered every corner of the industry, interviewing dermatologists and celebrities from Davina McCall to Dame Joan Collins, reporting backstage at London Fashion Week and judging the w&h Beauty Awards.