Editor's TipEditor's Tip

Get this conditioner, its hydrating shampoo counterpart, and nourishing body lotion in the Dark Reef Collection.

Number 4 Hair Care

Birchbox Breakdown

This decadent conditioner helps to bring dry, over- styled hair back to life. It’s loaded with moisturizing natural ingredients that calm frizz and restore fried ends and it also protects from future damage. Don’t tell our hair stylist, but this product is the reason we can go so long in between trims!

How it Works

This rich formula helps to rebuild hair inside and out: vitamin B5 and jojoba help to nourish and hydrate dry strands, while Number 4’s™ proprietary Liquid Complexes™ use potent natural ingredients like acai berry, vitamin C, and black current to moisturize, protect, and strengthen hair.

How to Use

Use on clean, damp hair. Depending on hair length and thickness, work one pump through the ends and mid-length of strands. Rinse completely and style as usual.

Water, Cyclopentasiloxane, Cetearyl Alcohol, Stearyl Alcohol, Cetrimonium Chloride, Behentrimonium Methosulfate, Fragrance, Glycereth-26, Dimethiconol, Divinyldimethicone/Dimethicone Copolymer, Gluconolactone, Cetrimonium Bromide, Panthenol, PPG-3 Benzyl Ether Myristate, Jojoba Esters, Quaternium-91, Amodimethicone, Hydroxyethylcellulose, Cetrimonium Methosulfate, Sodium Benzoate, C11-15 Pareth-7, PEG-45M, Laureth-9, Glycerin, Butyrospermum Parkii (Shea Butter), Aminomethyl Propanol, C12-13 Pareth-23, C12-13 Pareth-3, Cinnamidopropyltrimonium Chloride, Trideceth-12, Citric Acid, Cinnamyl Alcohol, Helianthus Annuus (Sunflower) Seed Oil, Ethylhexyl Methoxycinnamate, Sodium Ascorbyl Phosphate, Butylene Glycol, Helianthus Annuus (Sunflower) Seed Extract, Hydrolyzed Soy Protein, Macrocystis Pyrifera Extract, Ribes Nigrum (Black Currant) Leaf Extract, Yogurt Extract, Tocopheryl Acetate, Hydrolyzed Vegetable Protein PG-Propyl Silanetriol, Arctium Lappa Root Extract, Camellia Sinensis Leaf Extract, Chondrus Crispus (Carrageenan) Extract, Euterpe Oleracea Fruit Extract, Garcinia Mangostana Peel Extract, Hibiscus Sabdariffa Flower Extract, Ilex Paraguariensis Leaf Extract

More for You!
  • Free returns within 90 days of purchase
  • Extra samples and gifts in the Bonus Shop

Product Reviews & Sample Feedback

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Most Helpful Customer Reviews

For the price? Meh

I just tried this last night. A lot of people were complaining about the "masculine smell." I acutally like that it kind of smelled like a men's cologne. It doesn't linger, it just made it smell like a very handsome man was helping wash my hair. And it does feel very nice and my hair appears to have dried shinier and healthy looking.
But, I can't be sure if it's from this product or the stress I am currently enduring, but it feels like a bit more of my hair than usual has been falling out. It's nothing to panic about, just something annoying. If you get a sample (like I did), give it a shot. But for $78? Pass.

3
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Obsessed

What you need to know is that I have 1. curly hair 2. coarse curly hair 3. long, coarse, dry curly hair - and sometimes I straighten it.

When I say I've used everything under the sun, believe me I have. Name the brand or protect, I've tried it. And I'm OK with some of them, hateful of others and tired of paying over $30 for the ones in the middle. This conditioner was a game changer for me!

The smell is strong, but actually enjoyable - The texture is neither too runny or thick - and man, did it soften my locks. I'm definitely buying a full-size version and my only curiosity is whether, over-time, the silicone (which I usually stay away from) will cause build up and weigh down my curls. Totally willing to take the risk after using the sample!

5
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fantastic! works well and smells great

I love this conditioner. It smells fantastic and worked great. I felt like it left my hair clean but easy to brush. I was sad when I ran out.

5
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Great!

Fantastic products.... I used both the shampoo and conditioner and my hair feels and smells fantastic. However, $78 just for conditioner is a bit much...

5
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Just Okay

The smell is a little weird. I like that it didn't leave any residue in my hair, but was not overly impressed. Comparable in quality to higher end drug store brand.

3
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#4 hydrating conditioner

Although the sample said ultra-concentrated, i found it to be very thin in consistency. I have conditioners that work much better for about a tenth of the price. Maybe after a few uses it would have made a difference, but the sample was a one use foil packet. I think I'pass on this one.

1
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Only to go with the shampoo

I really enjoyed the shampoo that goes with this product, however, the conditioner sample was just okay. I didn't use that much each time (I usually don't for conditioner) and I don't think it really did much. In other words, I felt like it could have been any old bottle of conditioner instead of one that is $78.

4
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This stuff smells awful!

I was excited to try this but I couldn't get past the smell! It smells like awful men's cologne! Being a female I don't want to smell like men's cologne!

1
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life changing stuff!!

call me crazy but I verge on tears when I use this stuff with it's shampoo partner. I seriously damaged my hair when I would straighten it stick straight every day in high school. it got thinner, drier, and just really more difficult to grow long even with regular trims. hydrating shampoos seem to always make my hair get greasy really fast too, so it's been a frustrating process. when this (and the shampoo) came in my june box, I was eager to try it but tried not to get my hopes up. this stuff has transformed my hair! it does not weigh my hair down at all, it's never felt so light and healthy and shiny and bouncy, and it smells great and a little goes a long way! i'm hoping that it will help with growing my hair well too. it is pretty expensive, but I've decided to work towards getting some with my bb points. I can't give this line enough praises!

5
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Not bad

I have very dry ends due to a lot of color processing. Using this conditioner was nice but it's definitely not the best I've tried. I still had to use a leave-in conditioner to help detangle my hair and such. For the price it's going for, I personally don't think it's worth it. I'd rather go with it's a 10 leave in mask.

3
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