Kiehl's Smoothing Oil-Infused Leave-In Treatment (2.5 fl oz)
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$48.12 reg $49.12
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4.4 out of 5 stars with 192 reviews
5 out of 5 stars
26 February, 2026
originally posted on kiehls.com
Always reliable fomula
I recieved a gift of shampoo conditoner and the smooth leave in serum. The outstanding product for my curly wavy hair that is hard to manage with a brush or comb becomes so managable that with just a few pumps of the serum with the lovely smell that became notes I want to have in my hair to smell nicer besides I can apply with fingers and it goes through my curls better than any of the other natural oil combos I have used in the past !
5 out of 5 stars
24 January, 2026
originally posted on kiehls.com
Positively Addictive!
I usually buy fragrance-free, unscented products, but I am absolutey addicted to the light scent. The scent does fade quickly but smells wonderful and leaves me feeling that I've used a "high-end" product. I have untreated, waist-long, wavy blonde hair with quite a bit of silver. I do love the way it smooths out the subtle frizzies and fly-aways that I get. It is difficult to get any shine in my hair and this conditioner gives it a nice sheen. My only complaint would be that I go through it rather fast and it is pricey for the size. I would love to see this product in the Buy 1, Get 1 Free promos. I highly recommend this leave-in conditioner.
5 out of 5 stars
23 December, 2025
originally posted on kiehls.com
Best hair oil ever, hands down.
This is the best hair product I've ever used, hands down. Instant convert and super in love with how smooth and soft it makes my hair feel. I put it on wet hair after I wash it.
4 out of 5 stars
16 December, 2025
originally posted on kiehls.com
Wonderful oil!
This oil made my hair look magical! The only thing is it shortens the time until my hair gets greasy and the scent is a bit strong. I think the scent wears off rather quickly though so that’s ok. Honestly if I could, I’d rate it 4.5 stars. It’s just missing a tiny thing from 5 stars
5 out of 5 stars
14 October, 2025
originally posted on kiehls.com
Works as Advertised
[This review was collected as part of a promotion.] Saw this product on a list of best leave-in conditioners. Have been very pleased with results. Takes care of frizz and fly-aways and keeps hair conditioned and moisturized.
5 out of 5 stars
15 September, 2025
originally posted on kiehls.com
Great product
This hair product smells amazing and makes my hair feel soft and smooth.
5 out of 5 stars
7 August, 2025
originally posted on kiehls.com
Best product!
Smell is divine, oil is light and conditioning. Perfect for every day without build up.
1 out of 5 stars
27 July, 2025
originally posted on kiehls.com
Scent Too Strong
The scent is overpowering. I purchased this product for my beard and could not take the scent on my face.
1 reply from Consumer Care Center team - 8 months ago
Hi Petell! Thank you for taking the time to share your honest feedback regarding our Smoothing Oil-Infused Leave-In Concentrate. We truly appreciate you reaching out and letting us know about your experience. We are genuinely sorry to hear that the scent of the product was overpowering for you, particularly when used for your beard. We understand that fragrance preference is very personal, and what is delightful to one individual may not be ideal for another. Our aim is always to create products that enhance your daily routine, and we regret that this particular product did not meet your expectations in terms of its aroma for your specific use. We value all customer input, as it is invaluable in helping us to continually refine our formulations and improve our product offerings to better serve your needs.
5 out of 5 stars
27 July, 2025
originally posted on kiehls.com
Silky, Soft, and Smells Good
I’m digging this hair oil. I’ve used other hair oils that I’ve also liked but I always felt like they could get a little greasy, but not this one. It feels very light weight and I enjoy the smell.
5 out of 5 stars
23 July, 2025
originally posted on kiehls.com
GREAT HAIR PRODUCT
GREAT LEAVE-IN PRODUCT. HAIR HAS ESPECIALLY NICE SCENT.
5 out of 5 stars
17 June, 2025
originally posted on kiehls.com
great product
my hair frizzes a lot and being of African descent , my hair could be a bit difficult to manage especially after braids . this product has been the go to
5 out of 5 stars
8 June, 2025
originally posted on kiehls.com
Best leave-in treatment but sadly discontinues
Love this leave-in treatment. It’s the only thing that doesn’t leave my hair looking and feeling greasy. So disappointed that Kielhs has yet again discontinued a favorite product of mine.
5 out of 5 stars
2 April, 2025
originally posted on kiehls.com
Bouncy conditioned & shiny curls!
Absolutely loveeeeeethis product! I can wash n go - meaning after washing & conditioner apply a few pumps & let my hair dry. My curls are conditioned & bouncing! Also sooooo shiny!
5 out of 5 stars
22 March, 2025
originally posted on kiehls.com
Love This Smoothing Hair Product
I love this product. My hair has gotten a bit dry and frizzy and this has been the perfect solution.
5 out of 5 stars
15 January, 2025
originally posted on kiehls.com
This is the best thing i’ve ever put on my hair
I have no idea how not many people talk about this product. It is, hands down, an amazing that emulates the natural oils of your hair, I’m HEAVILY obsessed.
5 out of 5 stars
12 January, 2025
originally posted on kiehls.com
Alternative? Out of stock
Loved!!! this product for my husband’s 3A curls but we can no longer find it in stock. Does anyone have suggestions for a similar product? Preferably something with cleaner ingredients. Thanks!
5 out of 5 stars
22 December, 2024
originally posted on kiehls.com
Liquid Gold
[This review was collected as part of a promotion.] This stuff is incredible. I have curly hair that tends to get too dry and expand/frizz. Using this while my hair is still wet does incredible stuff. Really helps to lock in the curls and reduce the overall volume. Smells nice. This is now as essential for my showering as soap.
5 out of 5 stars
11 December, 2024
originally posted on kiehls.com
This product is the best leave-in oil treatment
This is the best product I have found for my curly dry hair. It Detangles and conditions, my hair and I always get Compliments on how my hair smells and looks after I use this product. It is my go to product for great hair. I
5 out of 5 stars
10 December, 2024
originally posted on kiehls.com
It solve my roughhousing it feeling.
It makes my hair feel smooth and soft all day it solves my rough hair feeling
5 out of 5 stars
27 October, 2024
originally posted on kiehls.com
Hair
I been using the oil for a very long time, I love how my hair looks and feel!