Number 4™ Fluoro5 Elixer Restore & Repair Oil

There was a time when we were a bit skeptical about hair oils—the last thing we wanted was a greasy, weighed down ’do. These days, however, we can't imagine a haircare routine without it. This strand-saving elixir gives drab, dull hair a coveted movie star shine (plus a whole host of reparative benefits). Our oil-free days are officially over.

Number 4™ Fluoro5 Elixer Restore & Repair Oil
4.2 out of 5 stars, based on 15,453 Reviews 15,453 Reviews
4.2 out of 5 stars
5 Star
7086
4 Star
5500
3 Star
2199
2 Star
474
1 Star
194
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25-34
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Be careful
Sampled

Use very sparingly and in small amounts or else your hair will look very greasy

4
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Weightless Shine

Love it! I have very very fine, long, color treated hair, so I need a little extra strength/moisture and shine without weighing down my hair any more than usual. I've tried all sorts of serums and glossing creams and stuff in the past with usually average results at best - either I'm not getting the shine results I want or I look like a wet dog, all weighed down with goop. Bought a bottle of this on a whim since I've been such a fan of the other Number 4 products I've sampled, and I'm SO glad I did. This is it.

After a couple of uses, hair is exceptionally shiny and looks healthier than usual. However, my hair is NOT weighed down at all. If anything, it's moving more than usual. And it feels super soft. I'm hoping continued use does improve the health of my hair, but even if not I'd keep using this stuff based on looks alone.

5
Was this review helpful to you? Yes | No 64 of 66 found this review helpful. Was this review helpful to you? Yes | No
LOVE
Sampled

Smells great, leaves my hair looking and feeling healthy, and is extremely potent. The product seems much more expensive than it is selling for and you only need a tiny amount!

5
Was this review helpful to you? Yes | No 9 of 9 found this review helpful. Was this review helpful to you? Yes | No
soft, silky, weightless - smells amazing
Purchased

I've been using this religiously for two years now - and have only just finished my second bottle! I have long, fine, straight, color-treated hair and this is a godsend. I use two pumps after I towel dry, and it makes my hair so smooth and silky, protects, the ends, and fights static and frizz. Plus, it smells amazing. My only complaint is the pump. It leaks if you try and travel with it. My solution is to pour a bit in another Birchbox hair oil sample container I received - and good to go!

5
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Highly recommend
Sampled

I use just a few drops on the ends of my wet hair and I enjoy the texture and shine that the producr provides. I have really dark, thick, long hair, so most products that I have tried I need to use tons to get the desired effect. This stuff really works with minimal application. Smells great too

5
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This is great!
Sampled

I really like this - I try to wash my hair as infrequently as possible, and this is GREAT for my non-washing days to keep my hair smooth, shiny and looking well-conditioned. It smells great too!

5
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Shine not grease!
Sampled

two thumbs up from this dry-haired blondie! Not only did I like the smell of this product, I also liked the appearance that it had once applied throughout my hair. Instead of giving off a thick and greasy look, it shimmered with a healthy glow. A little goes a long way!

5
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Nice
Sampled

Love the way it feels on my skin does not feel heavy or dry my skin

5
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Really good for curly hair
Sampled

My hair is dry and frizzy the product helped keep the curls in place without being overly oily. Very lite.

5
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Bit grease
Sampled

I generally don't use hair products especially oils. I didn't love this product, I feel it makes my hair too grease and left a lot of residue on my hands.

2
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