In Stock
Nécessaire

Rosemary Leave-In Mask

4.8 · 79 reviews
6,372 ₽

What it is: An advanced leave-in treatment mask with rosemary extract and 5% vegan keratin that smooths, softens, and strengthens hair immediately and over time.Hair Texture: Straight, Wavy, Curly, and CoilyHair Type: Fine, Medium, and ThickHair Concerns:- Damage, Split Ends, and Breakage- Frizz- Straightening and SmoothingKey Benefits: - Softer, smoother, healthier hair after first use- Long-term strengthening, repair, and protection- Minimizes frizzHighlighted Ingredients:- Rosemary Oil/Water/Extract: Strengthens hair at the root and nourishes the scalp.- Vegan Keratin 5%: Strengthens, restructures, and fortifies weakened strands.- 5 Plant Proteins: Protect hair from breakage.Ingredient Callouts: This product is vegan and cruelty-free.What Else You Need to Know: This leave-in treatment mask includes rosemary extract and conditioning agents that smooth, soften, and nourish. A concentration of five percent vegan keratin—with the same amino acid profile as natural keratin—strengthens and restructures weak, damaged hair for enhanced smoothness and vibrancy. It’s also dermatologist-tested, hypoallergenic, non-comedogenic, and color-safe.Clean at SephoraClean at Sephora is our commitment to offering effective products without certain ingredients, such as parabens, sulfates, phthalates, and mineral oils. Learn more here.

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What it is: An advanced leave-in treatment mask with rosemary extract and 5% vegan keratin that smooths, softens, and strengthens hair immediately and over time.Hair Texture: Straight, Wavy, Curly, and CoilyHair Type: Fine, Medium, and ThickHair Concerns:- Damage, Split Ends, and Breakage- Frizz- Straightening and SmoothingKey Benefits: - Softer, smoother, healthier hair after first use- Long-term strengthening, repair, and protection- Minimizes frizzHighlighted Ingredients:- Rosemary Oil/Water/Extract: Strengthens hair at the root and nourishes the scalp.- Vegan Keratin 5%: Strengthens, restructures, and fortifies weakened strands.- 5 Plant Proteins: Protect hair from breakage.Ingredient Callouts: This product is vegan and cruelty-free.What Else You Need to Know: This leave-in treatment mask includes rosemary extract and conditioning agents that smooth, soften, and nourish. A concentration of five percent vegan keratin—with the same amino acid profile as natural keratin—strengthens and restructures weak, damaged hair for enhanced smoothness and vibrancy. It’s also dermatologist-tested, hypoallergenic, non-comedogenic, and color-safe.Clean at SephoraClean at Sephora is our commitment to offering effective products without certain ingredients, such as parabens, sulfates, phthalates, and mineral oils. Learn more here.

Customer reviews

5.0
verified purchase
Good for fine hair

This is is my second time repurchasing. I have fine wavy hair and it does not weigh it down. I like to use it before a blowout. I love Necessaire hair products.

5/2/2026
5.0
verified purchase
Obsessed with the Entire Rosemary Line

I am absolutely obsessed with the Nécessaire Rosemary Leave-In Hair Mask. It has quickly become a staple in my routine. The texture is lightweight but incredibly nourishing, and it leaves my hair feeling soft, smooth, and healthy without weighing it down.

3/5/2026
4.0
verified purchase
Solid, but not a favorite

I like it fine. The scent is pretty faint, which was a little underwhelming for me. The mask itself is nice and lightweight, and it definitely helps with winter static without feeling heavy. That said, I’ve used other masks that I prefer more. Overall, it’s good and I’m happy to use it, but I wouldn’t say I’m in love.

1/24/2026
5.0
verified purchase

this mask is great for my 4c tight coily hair. i’ve been having so much shedding and breakage and a couple weeks of using this i notice much less breakage and my hair is so much easier to brush through

1/19/2026
4.0
verified purchase
My New Curly Hair Wash Day Fav!

I have normal to fine curly hair and I’m obsessed with the Necessaire Rosemary Leave-in Mask! The texture is lightweight, glides through my hair, and instantly detangles after washing. My curls feel so soft, defined, frizz-free, and the natural rosemary scent is soo good! I noticed stronger, smoother hair after just a few uses - definitely a new every-other wash day must!

1/8/2026
5.0
verified purchase
Love it!

I’ve been using this rosemary leave-in mask for a bit now and I really love it. It feels lightweight but still makes my hair noticeably softer and smoother without weighing it down. My hair looks healthier and more polished, especially on days I air dry or do a quick blowout. The rosemary scent is subtle and clean, not overpowering at all, which I appreciate. A little goes a long way, so even though it’s a smaller bottle it feels worth it. It’s become one of those products I reach for without thinking because it just works and makes my hair look better every time. Definitely a new staple for me.

1/8/2026
5.0
verified purchase
Healthy, nourished hair!

I’ve been using this leave-in hair mask for a while now, and I have to say, I have really been enjoying it, it leaves my hair feeling so soft and nourished! I have fine hair that can get weighed down/oily-looking pretty easily when using the wrong product, but this hair mask leaves my hair looking fluffy and voluminous, maybe even more so than it does when I don’t use it. My hair is a little bit on the shorter side so I tend to only need to use a pump or two of this product at a time, so if you have hair like mine it should last quite a while. The packaging is super sleek and easy to use and the mask itself smells absolutely amazing! It has a very elegant, clean scent. Overall, I would say that this a really great product if you’re looking for something that will leave your hair looking healthy and smelling beautifully.

1/8/2026
5.0
verified purchase

I love it! I have thin, long hair and it's usually a bit frizzy (not totally straight). This has been making my hair feel softer and less frizzy! I have split ends too so I'm hoping with more use, it will help with that as well. The texture is fine and doesn't weigh down my hair. I also like the way it smells!

1/8/2026
5.0
verified purchase
My New Favorite Leave-In!

I've got frizzy hair, and this new Nécessaire Rosemary Leave-In Mask has been a lifesaver! I've been using it after washing my hair, and it's been making a huge difference in the amount of frizz that I have. Usually, nothing helps it at all, but this new mask is like magic! Plus, it smells good, and it feels super lightweight, as if I didn't use anything on my hair, so that's a huge plus! I highly recommend this to anyone that's for stubborn, frizzy hair like myself!

1/8/2026
4.0
verified purchase
So nice!

I really enjoyed using the Rosemary mask! mybhair felt very soft and manageable..I used it with my rosemary shampoo and conditioner. i appreciate the ingredients list so much, I didn't find the rosemary scent to be overpowering at all.

1/8/2026