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Rosemary Leave-In Mask

60 ml / 2 fl oz
4.7
Rated 4.7 out of 5 stars
13 Reviews

The Necessary™ | Care For Your Body | Care For Your Planet

The Rosemary Leave-In Mask an advanced leave-in treatment mask for use 1-2 times per week or as needed. Rosemary Leave-In Mask also includes Rosemary Extract and conditioning agents that smooth, soften, and enhance silkiness and a concentration of 5% Vegan Keratin—with the same amino acid profile as natural keratin—helps strengthen, restructure, and fortify weakened strands. Rosemary Leave-In Mask works immediately for smoother, shinier hair and over time to repair the look of damage, reduce breakage, and protect against external stressors. A multi-benefit finishing step in the Rosemary regimen—or a standalone treatment for healthier-looking hair with a rich, nourishing texture and is infused with the brand’s signature rosemary scent. Dermatologist-Tested. Hypoallergenic. Non-Comedogenic. Vegan. Color-Safe.

$60

60 ml / 2 fl oz

Free US Shipping $75+ | Free Returns

The Necessary™ | Care For Your Body | Care For Your Planet

The Rosemary Leave-In Mask an advanced leave-in treatment mask for use 1-2 times per week or as needed. Rosemary Leave-In Mask also includes Rosemary Extract and conditioning agents that smooth, soften, and enhance silkiness and a concentration of 5% Vegan Keratin—with the same amino acid profile as natural keratin—helps strengthen, restructure, and fortify weakened strands. Rosemary Leave-In Mask works immediately for smoother, shinier hair and over time to repair the look of damage, reduce breakage, and protect against external stressors. A multi-benefit finishing step in the Rosemary regimen—or a standalone treatment for healthier-looking hair with a rich, nourishing texture and is infused with the brand’s signature rosemary scent. Dermatologist-Tested. Hypoallergenic. Non-Comedogenic. Vegan. Color-Safe.

Free US Shipping $75+ | Free Returns

BUY IT WITH

TARGETS

Hair Health

TREATMENT

Formula Contains:

Vegan Keratin
Vegan Protein
Rosemary Oil
Rosemary Extract
Rosemary Water
Capixyl™
Ceramides

See Ingredients

TESTED

Product Is:

  • Dermatologist-Tested
  • Hypoallergenic
  • Non-Comedogenic
  • EU Compliant
  • Certified Vegan
  • Cruelty-Free

TEXTURE

Emulsion

SCENT

Rosemary

pH

4.5 - 5.5

USAGE

See Usage

APPLICATION

FOOTPRINT

Brand Is:

  • 1% For The Planet
  • Certified B Corp
  • Certified Climate Neutral
  • Certified Plastic Neutral
  • Certified FCS
  • How2Recycle

AWARDS

2026 Harper’s Bazaar Hair Awards

How often should I use the Rosemary Leave-In Mask?

For best results use 1–2 times per week or as needed depending on your hair type — e.g. fine or oily hair may benefit from once per week or every other week, while dry or textured hair can tolerate more frequent treatments.

Answer

Should I apply the mask on wet or dry hair — and when during my wash routine?

Apply the mask after shampooing without conditioner, on damp or dry hair and leave in your hair. Shampooing first removes buildup, allowing the mask’s actives to penetrate more effectively.

Answer

How long should I leave the mask on for optimal results?

Leave in for at least 4-5 minutes to let ingredients absorb before any other treatment or proceeding to styling/brushing/additional regimen steps. Do not wash out.

Answer

Can I use the Rosemary Leave-In Mask if I have color-treated or chemically-treated hair?

Yes. The Rosemary Leave-In Mask is generally safe for color-treated or processed hair, and can help restore moisture, strength, and silkiness after coloring.

Answer

What kind of results should I expect — and how long until I see them?

With consistent use, you should notice improved softness, smoother strands, better manageability, less dryness or frizz — and over time, potentially stronger, more resilient hair.

Answer

4.7
Rated 4.7 out of 5 stars
Based on 13 reviews
Total 5 star reviews: 12 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 1
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13 reviews
  • Catherine S.
    Verified Buyer
    Reviewing
    Rosemary Leave-In Mask
    I recommend this product
    What are your skin concerns? Aging
    What are your hair concerns? Thinning
    Rated 5 out of 5 stars
    6/27/26
    What I’ve been looking for my whole life!

    This product is exactly what I’ve been looking for. A leave in conditioner that helps heal your hair and scalp that can also be used as a no-frizz styling crème!

    Was this helpful?
  • Sharon F.
    Verified Reviewer
    Reviewing
    Rosemary Leave-In Mask
    I recommend this product
    What are your skin concerns? Dryness, Aging
    What are your hair concerns? Thinning, Frizz
    Rated 5 out of 5 stars
    5/17/26
    Really impressed

    I have fine hair that is wavy borderline curly. I used two pumps in my medium length hair . Blowed dried and was amazed it wasnt greasy , made my hair fuller and more healthy after one use

    Was this helpful?
  • Taryn H.
    Verified Buyer
    Reviewing
    Rosemary Leave-In Mask
    I recommend this product
    What are your skin concerns? Aging, Dryness, Odor Protection, Uneven Skin/Spots, Ingrowns
    What are your hair concerns? Thinning
    Rated 5 out of 5 stars
    4/18/26
    Great

    I really like this hair mask. It didn’t weigh my hair down.

    Was this helpful?
  • Debra H.
    Verified Buyer
    Reviewing
    Rosemary Leave-In Mask
    I recommend this product
    What are your skin concerns? Aging, Uneven Skin/Spots
    What are your hair concerns? Damage
    Rated 5 out of 5 stars
    2/6/26
    Great

    I love it! I actually use a small amount daily to style my hair. I wish that you would create a line of facial care products for aging skin.

    Was this helpful?
  • Sophia
    Reviewing
    Rosemary Leave-In Mask
    I recommend this product
    Rated 5 out of 5 stars
    1/27/26
    5 Stars

    When I saw that Necessaire released another product in their rosemary hair care line, I had to try it. I am SO glad I did because it exceeded my expectations! This leave-in mask completely retexturized my hair. My frizzy, crazy, dry hair dried smooth, tame, and wavy. Absolutely phenomenal product! Necessaire’s whole rosemary hair line has completely transformed my hair. Everyone has been noticing how much better my hair has been looking lately!

    Was this helpful?