7 best leave-in conditioners for your softest hair ever, reviewed
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Leave-in conditioners have been a staple in my routine for as long as I can remember – partly because I’ve had ridiculously knotty hair since I was a kid, and partly because I’ve always loved anything that makes my hair feel softer, shinier and easier to deal with. But I really started to appreciate them properly last year, when I was trying to grow my hair for my wedding and suddenly became very serious about every single step in my routine. A leave-in conditioner was one of the few things I never skipped.
I wouldn’t put my hair growth down to leave-in conditioners alone, obviously. The best hair growth serums, the best hair masks for growth and my red light therapy hair growth device obsession may have had something to do with it, too. But I do think leave-in conditioners played a big part in helping my hair actually stay feeling healthy while I was growing it out. For me, they’re the step that makes everything else work a little harder: they help with detangling, give my hair that softer, salon feel, and stop it looking like I’ve been dragged through a hedge backwards.
Think of a leave-in conditioner as a balm that kind of does it all,” says Dimitris Giannetos, a celebrity hairstylist who works with the likes of Camila Cabello and Jasmine Tookes. “They can tame fly-aways and add shine - even if the hair is a bit dry or damaged,” he adds. Honestly, that’s exactly why I rate them so highly. I’ve done the hard work of testing different formulas so you don’t have to, and whether your hair is fine, thick, curly, straight or constantly in need of more moisture, these are the leave-in conditioners I’d actually recommend.
Meet the experts:
- Dimitris Giannetos, celebrity hair stylist.
- Mathilde Heather, Kérastase ambassador and founder of The Suite.
- Catherine Leray, Head of Research and Development at THG LABS.
- Ginger King, cosmetic chemist.
- Mona Gohara, MD, a board-certified dermatologist
How we tested the best leave-in conditioners:
As someone who’s genuinely obsessed with haircare, you’d better believe I did my research before putting this edit together. I trialled each leave-in conditioner for at least a month and paid attention to how it actually performed in my routine – not just how it felt on first use. And because I became slightly fixated on having healthier hair in the lead-up to my wedding last year, I know when a formula is really making a difference.
My hair leans dry, so I was looking for formulas that improved shine, softness and overall hair health, while helping with detangling and minimising breakage. I also consulted hair experts on the best ingredients to look for, and considered all the practical things too — like how the formula felt on my hair, whether it left any residue or greasiness, and, of course, how good it smelled. Testing on multiple hair types important to us at Glamour, so I also had the help from Glamour Contributor Denise Primbet, who tested and reviewed three products in this guide. See more about how we test here.
Why you can trust me:
I’ve been a beauty journalist for six years now – five at The Mirror and the past year at Glamour – and testing products has always been a huge part of what I do. Hair health has always been one of my biggest beauty priorities, but I became even more invested in it when I was growing my hair for my wedding last year. I get asked all the time how I got my hair so long, and the truth is, I’ve spent years working out which products are genuinely worth using and which ones just sound good on the bottle.
I’ve also had knotty, dry hair for as long as I can remember, so leave-in conditioner has never felt optional to me. I can still remember my mum spraying it through my hair as a kid to make brushing it even remotely manageable – and that’s probably why I still see it as such a staple now. The difference is, formulas have come a long way since then. These days, I want a leave-in conditioner that actually earns its place in my routine: something that helps protect against breakage, adds shine, supports the overall health of my hair and gives it that softer, healthier look without making it feel heavy or greasy.
Ahead, Glamour's edit of the best leave-in conditioners around, tried & tested…
Olaplex No.5 Leave In Moisturize and Mend Leave In Conditioner
- Key ingredients: Beet root extract, coconut oil, sunflower extract, hyaluronic acid.
- Best for: Dry and damaged hair.
- Fragrance-free? No.
At a glance: Olaplex's bond-building formulas are well-known for a good reason, and this leave-in conditioner is no different. Designed to repair brittle, broken stands, this product comes with ingredients such as coconut oil and hyaluronic acid to add softness to your hair without making it greasy.
Glamour-editor review: “Olaplex has always been a staple in my haircare routine, whether it’s the Bonding Oil or the No.3 Hair Perfector, so I had high hopes for this. The texture of this leave-in conditioner is creamy but still lightweight, so it spreads through my hair easily and doesn’t leave it feeling greasy. I really like the pump bottle too, because it makes it easy to control how much product I’m using. The bottle is on the smaller side, especially if you’ve got a lot of hair like I do, but a little goes a long way. For me, the biggest selling point is that it offers heat protection up to 232ºC, which makes it perfect to use before heat styling,” says Shani Cohen, Glamour’s Beauty Commerce Writer.
Save when you shop for leave in conditioners with these Sephora discount codes at checkout.
Fenty Hair The Water Boi Leave In Conditioner
- Key ingredients: Sunflower seed oil, macadamia oil, avocado oil, sweet almond oil.
- Best for: All hair types.
- Fragrance-free? No.
At a glance: With hydrating hyaluronic acid and a blend of nourishing oils, this lightweight leave-in helps smooth, soften and boost shine, all while keeping hair feeling light and smelling absolutely divine.
Glamour-editor review: “This is the first product I’ve tried from Fenty Hair, and to say I’m obsessed is an understatement. First of all, the bottle is huge (200ml), so I know it’s going to last me a while - and for the price, it seems like pretty good value. It smells incredible too, so it kind of doubles up as a hair perfume, and every time I use it my hair feels noticeably softer and looks so much shinier. My hair leans quite dry, especially through the ends, and this just gives it that extra hit of hydration without making it feel heavy or greasy. It’s one of those really easy, throw-it-on-and-go products that actually makes a difference,” says Shani Cohen, Glamour’s Beauty Commerce Writer.
Save when you shop for leave in conditioners with these LookFantastic discount codes at checkout.
- Key ingredients: Hydrolysed rice protein, blue sea kale leaf extract.
- Best for: All hair types.
- Fragrance-free? No.
At a glance: Ask any beauty editor and they'll rave about this formula. Money Mist is an ultra-fine leave-in conditioner spray that comes with a variety of nutrients that keep your hair well-hydrated and protected against breakage and heat. Given its lightweight nature, it's also a superb pick for those with oily or fine hair types.
Glamour-editor review: “When it comes to leave-in conditioners, I'm usually wary of products that weigh my hair down. Money Mist is a wash-day staple for me – it feels like nothing when applied, yet it somehow leaves my hair looking healthier, stronger and bouncier than ever,” says Glamour's Beauty Contributor Denise Primbet.
Save when you shop for leave in conditioners with these Amazon discount codes at checkout.
K18 Biomimetic Hairscience Leave-in Molecular Repair Hair Mask
- Key ingredients: K18PEPTIDE™, hydrolysed wheat protein.
- Best for: Dyed and damaged hair.
- Fragrance-free? No.
At a glance:: Far easier to add into your wash-day routine than your typical hair mask, simply shampoo your hair, towel-dry it, and apply this leave-in formula instead of conditioner. Infused with a unique patented K18Peptide that works on molecular level, this science-backed mask is capable of repairing even the most extreme damage. You only need to let it sit for four minutes before you can apply your hair styling product of choice, and carry on with your routine.
Glamour-editor review: “As someone who may have dyed my hair one too many times, trust me when I say that the results from this repairing hair mask were almost instant. After just one use, my hair felt stronger and smoother – this is definitely the kind of formula you reach for when your hair needs a serious reset,” says Glamour's Beauty Contributor Denise Primbet.
Save when you shop for leave in conditioners with these Cult Beauty discount codes at checkout.
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- Key ingredients: Glycerin, sunflower seed oil, bixa orellana seed extract.
- Best for: All hair types.
- Fragrance-free? No.
At a glance: If it doesn't take long for your hair to lose its silky sheen after blow-drying or heat-styling, then this moisturising milk will definitely help you out. A multi-functional product, it adds some much-needed moisture to dry strands, softens and detangles and protects against heat.
Glamour-editor review: “I love a hair product that saves me the trouble of having to use multiple different products at once. This all-in-one milk feels super nourishing upon application and makes detangling my hair an absolute breeze. And the shine it leaves behind is a cherry on top,” says Glamour's Beauty Contributor Denise Primbet.
Ouai Limited Edition St Barts Leave In Conditioner
- Key ingredients: Tamarind seed, vitamin E, panthenol, hydrolysed proteins.
- Best for: All hair types.
- Fragrance-free? No.
At a glance: If you like your haircare to double as fragrance, this is the one. Ouai’s St Barts Leave In Conditioner doesn’t just do the usual detangling, smoothing and heat-protecting – it smells incredible while doing it. The formula blends tamarind seed, vitamin E, panthenol and hydrolysed proteins to help strengthen, hydrate and protect hair, whether you’re using it post-wash, before styling or just as a quick refresh on dry lengths.
Glamour-editor review: “This is basically a hair perfume and conditioner in one - I’ve genuinely had people stop me on the street to ask what perfume I’m wearing. It leaves my hair looking really shiny and feeling softer straight away, and I love how easy it is to just mist through and go. The only downside for me is the bottle size — I’ve got quite a lot of hair, so I do find myself getting through it pretty quickly,” says Shani Cohen, Glamour’s Beauty Commerce Writer.
Save when you shop for leave in conditioners with these Boots discount codes at checkout.
Living Proof Leave-In Conditioning Spray
- Key ingredients: Time-release peptides, active de-tangling ingredients, superfood antioxidant complex.
- Best for: Dry and damaged hair.
- Fragrance-free? No.
At a glance: Designed for dry, damaged hair, this lightweight leave-in spray helps soften, detangle and hydrate without weighing lengths down. It also helps protect against UV damage and makes styling feel a lot easier, especially if your ends are feeling overworked.
Glamour-editor review: “I’ve been using this leave-in spray for around a month now, and I didn’t think I’d find a product I liked quite as much as the Living Proof Perfect Hair Day Dry Shampoo - but I was wrong. The spray itself feels really lightweight, so it never leaves my hair feeling wet, sticky or heavy, and I love that the bottle is a decent size, so it actually lasts a while. The nozzle is also really precise, which makes it easy to spray from root to ends without going overboard. It leaves my hair feeling softer and looking shinier, whether I’m blow-drying it properly or just leaving it to air-dry naturally. The only thing I’d say is that it doesn’t have much of a scent, so if you want something that doubles as a bit of a hair perfume, I’d go for Davines or Ouai instead,” says Shani Cohen, Glamour’s Beauty Commerce Writer.
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All your leave-in conditioner questions, answered:
What do leave-in conditioners do?
According to Mathilde Heather, Kérastase ambassador and founder of The Suite, “a leave in conditioner hydrates and moisturises the hair continuously. It also provides much needed protection for styling.”
They're particularly great for those of us perpetually in a rush — for when we may not have 15 minutes to wait for a hair mask to work its magic, but we still want to give our hair a little extra love.
“A well-chosen leave-in conditioner can be beneficial for many hair types – the key is choosing the one best suited to your hair type or concerns. Their primary aim is to detangle and condition hair, but they can be incredibly versatile depending on the formulation, whether it's to reduce dryness and frizz or to add a shine-boosting finishing touch," says Catherine Leray, Head of Research and Development at THG LABS.
As far as consistencies go, Mathilde shares that “creams are ideal for coarse and thick hair,” while “serums and lightweight sprays are a great option for all hair types.”
What ingredients should I look for in leave-in conditioners?
What's shopping for a new hair-care product without considering chemistry? Cosmetic chemist Ginger King suggests ingredients like oils, fatty alcohols, and triglycerides that will "smooth the cuticles and keep the hair in place." For detangling in particular, King notes that compounds like quaternium 4, 7, and 11 work well (and to look out for ingredient names that start with quaternium or polyquaternium).
Mona Gohara, MD, a board-certified dermatologist based in Connecticut, notes that humectants like hyaluronic acid in hair care can be key. "[Hyaluronic acid] revives dry strands and restores softness in just one minute," she says. "Just like your skin, your hair loses moisture daily—from heat styling, environmental stressors, and even washing. Without proper hydration, it becomes dry, brittle, and prone to breakage."
Can I use a leave-in conditioner every day?
Leave-in conditioners are designed to be lightweight and provide ongoing hydration and nourishment to the hair without weighing it down. However, it's essential to consider your hair type, texture, and specific needs when determining the frequency of use.
“Using a leave-in conditioner every day is safe and can be good for your hair if you are looking for added moisture, protection, or nourishment in between washes. You need to consider your hair type and concerns as some leave-in conditioners might be heavier than others, weighing your hair down or showing signs of build-up on your hair,” adds Catherine.
It's also worth noting that using too much product or applying it too close to the roots can lead to build-up, so be mindful of the amount and placement of the leave-in conditioner to maintain a balanced and healthy hair environment.
How to use a leave-in conditioner correctly
“Putting on soaking wet hair will force the product to slide right off. You want to apply to damp or towel dried hair for best absorption,” shares Mathilde. Ideally, she recommends using it “after your cleansing (shampooing) routine.”
First, she advises to “gently towel dry your hair and apply a small amount of the leave in conditioner.”
Next, “proceed to comb through your hair from root to tip (starting at your mid lengths) then apply another small amount,” she adds.
