• One.Leave
  • One.Leave
  • One.Leave
  • One.Leave
  • One.Leave
(664 reviews)

One.Leave

£29.00
£29.00
Sale Sold out
Size:

The Multitasking Leave-In Conditioning Spray

Meet One.Leave — the multitasking leave-in your routine has been missing. One weightless mist does the work of a shelf full of products: it protects against UV and heat, floods dry lengths with moisture, tames frizz and leaves a soft, glossy finish. Built for summer, holidays and everything the weather throws at your hair — and two years in the making, because we wouldn't launch it until it was perfect.

Powered by an 18-amino-acid + collagen complex:
• Amino Acid Complex – 18 amino acids that strengthen the hair fibre and support repair
• Hydrolyzed Collagen – film-forms to improve resilience and resistance
• Panthenol (Pro-Vitamin B5) – deep hydration, elasticity and shine
• Coconut Water (Cocos Nucifera) – lightweight hydration and minerals
• NMF-like humectants (Sodium PCA + Sodium Lactate) – lock in long-lasting moisture
• UV Filter (Ethylhexyl Methoxycinnamate) – shields hair and colour from the sun
• Next-gen silicones (Dimethicone, Phenyl Trimethicone) – heat protection, smoothness and shine
• Conditioning agents (Quaternium-80, Behentrimonium Chloride) – anti-frizz, detangling and slip

• One Spray, Every Job — UV, heat, hydration, anti-frizz and shine in a single weightless mist
• UV & Colour Protection — a UV filter shields hair from the sun and helps prevent colour fade
• Heat Protection — guards against blow-dryers and hot tools, up to 200°C
• Deep, Long-Lasting Hydration — an NMF-like humectant system and pro-vitamin B5 flood dry lengths and hold moisture
• Repair & Strength — an 18-amino-acid and collagen complex helps restore and strengthen the fibre
• Anti-Frizz & Anti-Humidity — smooths flyaways and holds smoothness, even in humidity
• Lightweight & Non-Greasy — weightless, never weighs hair down or leaves residue
• Soft, Glossy Finish — leaves hair silky-smooth with a healthy shine
• Detangles & Softens — adds slip for easier combing and styling
• Built for Travel — protects against sun, salt, chlorine and pollution wherever you go

Summer is brutal on hair. Sun fades and dries it, salt and chlorine strip it, humidity undoes your style and heat tools add to the damage — and most routines need three or four separate products to cope. One.Leave replaces all of them. A single leave-in mist that protects, hydrates, smooths and adds shine in one step, so your hair stays healthy and holiday-ready with none of the effort.

On damp hair (main use):

  1. Wash and towel-dry to remove excess water.
  2. Spray directly onto hair, or into hands.
  3. Apply from mid-lengths to ends, avoiding the roots.
  4. Comb through and style — blow-dry or air-dry.

On dry hair (touch-up): spray into hands and smooth over ends and dry areas, 2–6 sprays depending on length. Use before heat styling.

Tip: use a little less on fine hair; apply more generously and comb through on thick or curly hair.

Aqua, Behentrimonium Chloride, Dimethicone, Propylene Glycol, Cetearyl Alcohol, Isopropyl Alcohol, Phenyl Trimethicone, Myristyl Alcohol, Cetyl Alcohol, Phenoxyethanol, Ethylhexylglycerin, Panthenol, Parfum, Cocos Nucifera Extract, Quaternium-80, Ethylhexyl Methoxycinnamate, Sodium PCA, Sodium Lactate, Arginine, Aspartic Acid, PCA, Glycine, Alanine, Serine, Valine, Isoleucine, Threonine, Proline, Histidine, Phenylalanine, Disodium EDTA, Hydrolyzed Collagen, Lactic Acid.

One.Leave launches mid-July. Join the waitlist now for 25% off and first access.

New to Keratin Revolution? Find Your Ritual

Salon Approved

Trusted By Over 3000+ Salons Worldwide

Fast & Free Shipping

Doorstep delivery across the UK, US and EU.

Eco-conscious

All our packaging is 100% recyclable

UK Brand

Founded in the United Kingdom
One.Leave
One.Leave
From
£14.00
From
£14.00
£21.75
35%
One.Leave
One.Leave
From
£14.00
From
£14.00
£21.75
35%
Silk Coat 150ml
Silk Coat 150ml
£35.00
£35.00
Smooth Hair Routine Starter Kit
Smooth Hair Routine Starter Kit
£39.00
£39.00
Molecular Repair & Smooth Starter Kit
Molecular Repair & Smooth Starter Kit
£56.00
£56.00
Molecular Repair & Smooth Starter Kit
Molecular Repair & Smooth Starter Kit
£56.00
£56.00
Smooth & Moisture Conditioner 100ml
Smooth & Moisture Conditioner 100ml
£11.00
£11.00
Silk Coat 150ml
Silk Coat 150ml
£35.00
£35.00
Silk Coat 150ml
Silk Coat 150ml
£35.00
£35.00
Silk Coat 150ml
Silk Coat 150ml
£35.00
£35.00
Silk Coat 150ml
Silk Coat 150ml
£35.00
£35.00
Silk Coat 150ml
Silk Coat 150ml
£35.00
£35.00

Here's why over 10 000 use KR as part of their daily routine

One.Leave One.Leave

Sun Shield

A built-in UV filter protects hair and colour from sun exposure and fade.

Heat Defence

Shields hair from blow-dryers and hot tools, Shields hair from blow-dryers and hot tools.

Moisture Magnet

Locks in long-lasting hydration for soft, supple, flexible lengths.

Humidity Armour

Tames frizz and holds smoothness, even in high humidity.

Strength Complex

18 amino acids and collagen reinforce and strengthen every strand.

Fast & Effortless

One weightless, leave-in mist; no rinsing, no downtime.

Frequently Asked Questions

One.Leave is a leave-in conditioner designed to do multiple jobs in a single step. It detangles, conditions, protects against heat and UV damage, and primes hair for styling — all without rinsing. It's the ideal base for any styling or treatment routine.

No — One.Leave is a leave-in product. Apply to clean, towel-dried hair and style as normal. There's no need to rinse.

Yes. One.Leave provides heat protection up to 230°C, making it suitable to use before blow-drying, straightening, or curling. It forms a protective barrier around the hair shaft to minimise heat-related damage.

Yes — One.Leave is fully compatible with keratin-treated hair. It helps maintain moisture balance and smoothness post-treatment without interfering with your results.

Yes. One.Leave is colour-safe and free from ingredients that cause colour fade. The UV protection element also helps shield colour-treated hair from sun-related colour degradation.

Others also viewed

Customer Reviews

Overall rating: 4.6 / 5 from 664 reviews.

Customer photo review of Silk Perfection Duo

The Silk coat works wonders the oil still a good finish oil

Idalina V. 5/5 Verified

Silk Perfection Duo

Store owner replied: Hi Idalina, thank you so much for your lovely review! We’re delighted to hear that Silk Coat is working wonders for your hair and that you’re enjoying the Argan Oil as a finishing touch too. They make a fantastic combination! 💫 Kind regards, — Team Keratin Revolution 💫

Customer photo review of Jet Set Kit

The Keratin treatment is supposed to, help your curls and reduce frizz, didn't see any changes after using the kit. So a bit disappointed.

Sandra H. 2/5 Verified

Jet Set Kit

Store owner replied: Hi Sandra, thank you for your feedback. We’re sorry to hear the Jet Set Kit didn’t give you the results you were hoping for. The Jet Set Kit is an aftercare haircare set rather than a keratin treatment itself, so it won’t provide the same smoothing and anti-frizz results as a keratin treatment. It is designed to help care for the hair and maintain the results of a treatment. Please feel free to reach out to us directly and we’ll be more than happy to advise you on the best products or treatment for your curls and frizz. 💫 Kind regards, — Team Keratin Revolution 💫

Customer photo review of One.Leave

love this product

Zuriela S. 5/5 Verified

One.Leave

Store owner replied: Hi Zuriela, thank you so much for your lovely review! We’re delighted to hear you’re loving One.Leave. Thank you for your support, and we hope it continues to leave your hair feeling amazing! 💫 Kind regards, — Team Keratin Revolution 💫

Customer photo review of Smooth & Repair Discovery Set

My silk coat bottle arrived empty. I tried to go on the chat to see if I could get a replacement but no one came on the chat.

Nyasha M. 2/5 Verified

Smooth & Repair Discovery Set

Store owner replied: Hi Nyasha, we’re so sorry to hear your Silk Coat arrived empty and that you weren’t able to reach us via chat. Please contact us at [hello@keratinrevolution.co.uk](mailto:hello@keratinrevolution.co.uk) with your order number and a photo of the Silk Coat bottle and packaging, and we’ll be happy to arrange a replacement for you. 💫 Kind regards, — Team Keratin Revolution 💫

Customer photo review of Argan Oil Hair Treatment 30ml

smell gorgeous, start with small to see if i like it? so i did trying it twice in two days, no greasy, felt soft and smooth. I love it also recommended it!!.

H C. 5/5 Verified

Argan Oil Hair Treatment 30ml

Store owner replied: Hi there, thank you so much for your wonderful review! We’re delighted to hear you’re loving the Argan Oil Hair Treatment and its gorgeous fragrance. It’s fantastic to know it leaves your hair soft and smooth without feeling greasy. Thank you so much for recommending it! 💫 Kind regards, — Team Keratin Revolution 💫

Customer photo review of Silk Coat 150ml

Lovely, great stuff

Benedicta N. 5/5 Verified

Silk Coat 150ml

Store owner replied: Hi Benedicta, thank you so much for taking the time to leave a 5-star review for the Silk Coat! We truly appreciate your support and hope you're enjoying the results. If you ever have any questions or would like tips on getting the very best from the product, we're always happy to help. 💫 Kind regards, — Team Keratin Revolution 💫

Customer photo review of Silk Coat 35ml

You need to improve the packaging this is the 2nd one ive purchased where its just come undone and spilt

Claire B. 1/5 Verified

Silk Coat 35ml

Customer photo review of Silk Coat 150ml

today first time use it on my hair this morning, lovely smell, so smooth so i was out all day outside wind and my hair was the same as this morning nothing change! omg! i love it already!! definitely recommend 👍🏼🫶🏻

H C. 5/5 Verified

Silk Coat 150ml

Store owner replied: Hi there, thank you so much for your amazing review! We’re absolutely delighted to hear you loved the Silk Coat from your very first use. It’s wonderful to know your hair stayed smooth all day, even in the wind! Thank you so much for your recommendation—we’re so happy you’re loving it already! 🫶🏻💫 Kind regards, — Team Keratin Revolution 💫

Customer photo review of Silk Coat 50ml

I send email twice order number 28833. Have not got a reply. Thanks

Rhoda W. 1/5

Silk Coat 50ml

Store owner replied: Hi Rhoda, we're so sorry for the inconvenience. We have actually tried replying to your emails, but unfortunately they keep bouncing back because your email inbox appears to be full. To make sure we can help you as quickly as possible, we'll send you a WhatsApp message shortly regarding your order. Kind regards, — Team Keratin Revolution 💫

Customer video review of Duo Pack of Shampoo and Conditioner 500ml

Amazing results

Sara I. 5/5 Verified

Duo Pack of Shampoo and Conditioner 500ml

Store owner replied: Hi, thank you so much for your lovely review! We’re delighted to hear you’re seeing amazing results with the Duo Pack. Thank you for choosing Keratin Revolution and for taking the time to share your experience with us. 💫 Kind regards, — Team Keratin Revolution 💫

Customer photo review of Smooth & Moisture Treatment Mask 200ml

Thank you my hair feels soft and shiny after mask and hair spray, lovely product

Rowena A. 5/5 Verified

Smooth & Moisture Treatment Mask 200ml

Store owner replied: Thank you for your feedback — we’re so pleased it’s helping your hair feel and look its best. — Team Keratin Revolution 💫

Customer photo review of Silk Coat 150ml with Free Detangling Brush

This product is amazing. Love it 🥰 Does exactly what is says thanks

Paula Q. 5/5 Verified

Silk Coat 150ml with Free Detangling Brush

Store owner replied: Thank you for your kind words — we’re delighted you’re enjoying the benefits already. — Team Keratin Revolution 💫

Customer photo review of Smooth & Moisture Shampoo + Conditioner Duo

Hair felt super soft and shiny after a wash and, most importantly, was significantly less frizzy even after being caught in the rain!

Chloe J. 5/5 Verified

Smooth & Moisture Shampoo + Conditioner Duo

Store owner replied: Hi, thank you so much for your lovely review! We’re thrilled to hear your hair felt so soft, shiny, and noticeably less frizzy — even after being caught in the rain, that’s amazing! And thank you for sharing your beautiful photo too, we love seeing your results. 💫 Kind regards, — Team Keratin Revolution 💫

Customer photo review of Silk Coat 150ml

It was delivered as it says it was going to be delivered.

Benedicta N. 5/5 Verified

Silk Coat 150ml

Store owner replied: So glad to hear our product is giving you the finish you wanted. — Team Keratin Revolution 💫

Customer photo review of Silk Coat 35ml

I have had so many complements on my hair since using this product ranging from what technique Is used on your hair, how do you keep your hair so long, blonde and healthy, your hair is beautiful. Well partly this is down to having an amazing hairdresser but this product is simply insane, no static, shine without looking heavy or greasy and it looks incredibly healthy and feels really resilient and strong. Not sure ? Try the small size first ensure you follow the heat application instructions or it won’t work properly. Honestly my boyfriend keeps twiddling my hair because he says it feels silky ( bit annoying but demonstrates my point ) this product right here is amazing, buy it and don’t look back

Kat H. 5/5 Verified

Silk Coat 35ml

Store owner replied: We’re thrilled to hear this! Smooth, shiny, frizz-free hair is exactly what we aim for. — Team Keratin Revolution 💫

Customer video review of Silk Coat 150ml with Free Detangling Brush

very dubious but really does work - hair not as frizzy really impressed

Sarah B. 4/5 Verified

Silk Coat 150ml with Free Detangling Brush

Store owner replied: Thank you for your kind words — we’re delighted you’re enjoying the benefits already. — Team Keratin Revolution 💫

Customer photo review of Silk Coat 35ml

My hair feels soft and no fly away bits ! Considering I’ve just been abroad for 2 weeks it doesn’t feel dry at all ! X Just trying how to get the percent off first big order now x

Janice A. 5/5 Verified

Silk Coat 35ml

Store owner replied: Hi Janice, thank you so much for your lovely review! We’re thrilled to hear the Silk Coat kept your hair soft, smooth, and flyaway-free even after two weeks abroad — that’s brilliant to hear. 💫 For your first-order discount, please email us at hello@keratinrevolution.co.uk and our team will be happy to help you apply it to your next order. Kind regards, — Team Keratin Revolution 💫

Customer photo review of Silk Coat 35ml

After to weeks in the carribean sunshine my hair was like straw ! I used this for the first time and my hair has a shine to it, I didn’t put any other product on it at all just sprayed the keratin.. really recommend it! My hair even dried easily everyone asked if I had just had my hair done at the hairdressers.

Janice A. 5/5 Verified

Silk Coat 35ml

Store owner replied: It’s wonderful to hear you’re happy with the product and results. Thanks for letting us know! — Team Keratin Revolution 💫

Customer photo review of Silk Coat 150ml

Lovely product. Left my hair smooth and shiny. Highly recommend.

Tracey Diane S. 5/5 Verified

Silk Coat 150ml

Store owner replied: Hearing this feedback keeps us motivated — thank you so much. — Team Keratin Revolution 💫

Customer photo review of Silk Coat 50ml

My hair is so soft, shiny and smells amazing, also used the formula five

Lyndsay M. 5/5 Verified

Silk Coat 50ml

Store owner replied: It’s wonderful to know you’re pleased — smooth, shiny hair never goes out of style. — Team Keratin Revolution 💫

Customer photo review of Smooth & Moisture Treatment Mask 200ml

This mask is my go to conditioner it takes my keratin treated hair i use it once a week and always add in the K R argan oil just to give it more of a boost and omg it really leaves my hair looking soft and smooth

Jennifer G. 5/5 Verified

Smooth & Moisture Treatment Mask 200ml

Store owner replied: Hi, thank you so much for your lovely review! We’re thrilled to hear the treatment mask is your go-to and that pairing it with our argan oil gives your keratin-treated hair that extra boost. Soft and smooth results are exactly what we love to hear — we’re so glad it’s working beautifully for you! 💫 Kind regards, — Team Keratin Revolution 💫

Customer photo review of Silk Coat 150ml with Free Detangling Brush

Amazing stunning this product leaves my hair feeling soft and frizzy free and you only need a few sprays I use it before I go in the sauna after the gym and it leaves my hair feeling so soft and still straight

Jennifer G. 5/5 Verified

Silk Coat 150ml with Free Detangling Brush

Store owner replied: Hi, thank you so much for your amazing review! We’re absolutely delighted to hear how well the Silk Coat works for you — especially that it keeps your hair soft, straight, and frizz-free even after the sauna. You’re absolutely right, a few sprays really do go a long way! We truly appreciate your support. 💫 Kind regards, — Team Keratin Revolution 💫

Customer photo review of Argan Oil Hair Treatment 100ml

This is beautiful light weight it smells nice and leaves your hair feeling soft and smoother

Jennifer G. 5/5 Verified

Argan Oil Hair Treatment 100ml

Store owner replied: Your kind words truly mean a lot — thank you for trusting us with your hair. — Team Keratin Revolution 💫

Customer photo review of Silk Coat 35ml

Silk Coat is a game changing product. It it's very easy to apply,makes my hair so smooth and shiny, lasts for a long time and completely takes out the frizz (I have Irish hair which is partly frizzy and partly straight). It makes the hair much more water repellent and as a result, much quicker to dry and easier to style. I absolutely love it. It smells lovely too!

Janet L. 5/5 Verified

Silk Coat 35ml

Store owner replied: Hi Janet, thank you so much for your amazing review! We’re thrilled to hear how much you love the Silk Coat and that it’s made such a difference to your hair — smoother, shinier, quicker to dry, and frizz-free sounds perfect! We’re so happy it’s become a game changer for you. 💫 Kind regards, — Team Keratin Revolution 💫

Customer photo review of Formula Five

Ive got to say first time buying and it works its amazing I will be buying again, I try so many things and they don’t work but this it’s amazing

Tracy S. 5/5 Verified

Formula Five

Store owner replied: "Thank you for your kind words — we’re delighted you’re enjoying the benefits already. — Team Keratin Revolution 💫"

Customer photo review of Silk Coat 150ml

Love this product. Keeps the friz away and makes my hair feel and look good Glad I’ve found it

Ginnette W. 5/5 Verified

Silk Coat 150ml

Store owner replied: "So happy to know you’re enjoying the product — here’s to more good hair days! — Team Keratin Revolution 💫"

Customer photo review of Smooth & Moisture Shampoo + Conditioner Duo

Please with the products

Helen P. 5/5 Verified

Smooth & Moisture Shampoo + Conditioner Duo

Store owner replied: "We really appreciate your support — thank you for your lovely review. — Team Keratin Revolution 💫"

Customer photo review of Argan Oil Hair Treatment 100ml

Love love love this oil. I don’t have any complaints about this product it has saved my hair. I’m able to retain more length and keep my hair moisturised without it feeling weighed down or greasy. It smells divine, I wish there was a fragrance for it.

Christiana A. 5/5 Verified

Argan Oil Hair Treatment 100ml

Store owner replied: Thank you so much for your wonderful feedback! We’re absolutely delighted to hear how much you love the oil and that it has helped keep your hair healthy, moisturised, and full of life. It’s great to know the lightweight feel works perfectly for you. We’ll definitely pass your lovely suggestion about a fragrance along to our team – that’s such a great idea! Keratin Revolution Team

Customer photo review of Silk Coat 150ml

The silk coat was okay, but I prefer the old formula in the glass bottle. It was superb on my hair and it just doesn’t feel the same anymore. I would still purchase it again occasionally, because it’s better than most on the market and it smells lovely.

Christiana A. 2/5 Verified

Silk Coat 150ml

Store owner replied: Thank you for taking the time to share your thoughts with us. We’re truly grateful for your loyalty and feedback. We understand how much you loved the original formula in the glass bottle, and we’ll certainly pass your comments along to our product team. We’re glad to hear that you still find the silk coat better than most on the market and that you enjoy the fragrance. Your support means a lot to us. Kind regards, Keratin Revolution Team

Customer photo review of Silk Coat 150ml

After blow drying my hair is smooth then goes fluffy. Using Silk coat keeps it smooth and the photo is after being out in very windy weather with a light rain shower so yes this product does work on my fine hair. Great product, would recommend!!

Isobel C. 5/5 Verified

Silk Coat 150ml

Store owner replied: "Thank you for your feedback — we’re so pleased it’s helping your hair feel and look its best. — Team Keratin Revolution 💫"

Customer photo review of Smooth & Moisture Shampoo + Conditioner Duo

I have been the smooth shampoo, conditioner, silk coat and argan oil. I am regular customer which find it really good for my hair. My type of hair is thick unruly hair and frizzy at times. The set helps me a lot to manage my hair. Even my hair feels soft and shines. For me next to try is the hair mask.

Ogerta F. 5/5 Verified

Smooth & Moisture Shampoo + Conditioner Duo

Store owner replied: "We’re so pleased you’re getting the results you were looking for. — Team Keratin Revolution 💫"

Customer photo review of Silk Coat 150ml

Love this product . On my second bottle . Hair is a lot less frizzy

Ginnette W. 5/5 Verified

Silk Coat 150ml

Store owner replied: "Thank you for sharing your experience — we’re so happy it’s working well for you. — Team Keratin Revolution 💫"

Customer photo review of Silk Coat 35ml

Tried so many products for thin hair that weigh it down and make it look greasy. This did the opposite so happy

Rob M. 5/5 Verified

Silk Coat 35ml

Store owner replied: "Wonderful to hear you’re loving the results — that’s exactly what we aim for. And you look absolutely stunning! — Team Keratin Revolution 💫"

Customer video review of Smooth & Moisture Shampoo + Conditioner Duo

It’s made my hair silky soft and much smoother. Very happy with the products and I’ll be purchasing again

Katie B. 5/5 Verified

Smooth & Moisture Shampoo + Conditioner Duo

Store owner replied: "Always wonderful to hear feedback like this — thank you so much. You look absolutely gorgeous! — Team Keratin Revolution 💫"

Customer photo review of Smooth & Moisture Shampoo 300ml

Highly satisfied with the product

Delna V. 5/5 Verified

Smooth & Moisture Shampoo 300ml

Store owner replied: "Great to know you’re happy with the product — thanks for sharing your thoughts. — Team Keratin Revolution 💫"

Customer photo review of Shampoo and Conditioner Duo Set

Amazing product, totally recommend hair is smooth and silky

Andrea B. 5/5 Verified

Shampoo and Conditioner Duo Set

Store owner replied: "Amazing to hear you’re enjoying it — that’s exactly what we designed it for. — Team Keratin Revolution 💫"

Customer photo review of Smooth & Moisture Shampoo + Conditioner Duo

Keeps my hair more controlled in balmy conditions, I take the travel pouches to combat the humidity. I really do love this shampoo and conditioner

Sue K. 5/5 Verified

Smooth & Moisture Shampoo + Conditioner Duo

Store owner replied: "Your support means the world — thank you for your positive review. — Team Keratin Revolution 💫"

Customer photo review of Argan Oil Hair Treatment 30ml (Pro)

I Love this argan oil on my clients and great smell ❤️

Vania Rocha R. 5/5 Verified

Argan Oil Hair Treatment 30ml (Pro)

Store owner replied: "We’re over the moon that you’re loving your results. That smooth, healthy finish is what we’re all about. — Team Keratin Revolution 💫"

Customer video review of Keratin Treatment 1000ml

After work with keratin Revolution over 3 years, im very satisfied and I rrecommended for sure 😊

Vania Rocha R. 5/5 Verified

Keratin Treatment 1000ml

Store owner replied: "Thanks so much for sharing — it makes us so happy to know our products are making a difference! — Team Keratin Revolution 💫"