Rosemary Leave-In Mask

60 ml / 2 fl oz
5.0
Rated 5.0 out of 5 stars
6 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

FOOTPRINT

Brand Is:

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

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



5.0
Rated 5.0 out of 5 stars
Based on 6 reviews
Total 5 star reviews: 6 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
6 reviews
  • Brooke R.
    Verified Buyer
    Reviewing
    Rosemary Leave-In Mask
    I recommend this product
    Rated 5 out of 5 stars
    1/9/26
    Staple addition to my hair health journey

    I enjoy this product because it’s easy to incorporate into my existing routine, it really does make my hair feel easier to manage, and I like the simplified packaging compared to other leave-in products. You use this product after shampoo-ing and leave it in and style your hair as normal, so there’s no sitting around for an additional 10-30 min and there’s no additional step to your normal routine. The product itself is thick and creamy just like a conditioner. I was nervous it would make my hair feel like there was a residue to it after styling as normal OR even when air drying, but that hasn’t been the case. I really like using this product on the days when I use a clarifying shampoo. I was surprised at how much I appreciated this style of packaging for a hair mask. Typically, masks are given in a tub-style container because of the thickness of the product. This is obviously in a pump, but it’s a non-stick style of a spring pump like other Necessaire products. I’ve really enjoyed introducing this item into my hair journey and I’ll know in another 6 months if this is “effective” but I love it so far!

  • Leslie
    Verified Buyer
    Reviewing
    Rosemary Leave-In Mask
    I recommend this product
    What are your skin concerns? Aging, Acne, Dryness
    What are your hair concerns? Damage, Dryness
    Rated 5 out of 5 stars
    1/9/26
    Another great product!!

    I was so excited to try this new leave in mask. I have been seeing great results from the rosemary serum, so I cant wait to see the long term effects of this one as well! I typically only wash my hair 1-2 times per week. I have long, thick and semi curly hair. I definitely have some heat damage from over the years and have been trying to minimize further damage and promote new growth. So far, the mask has been great. My hair feels healthier and shinier. The mask itself is not too thick or greasy. Much like the serum, the rosemary smell is not overwhelming at all. While it’s only been a few weeks, I would definitely recommend, especially if you use other products in the rosemary line. It’s a great addition to my weekly routine!!

  • Sydney T.
    Verified Buyer
    Reviewing
    Rosemary Leave-In Mask
    I recommend this product
    What are your skin concerns? Ingrowns, Uneven Skin/Spots, Acne, Dryness, Discoloration
    What are your hair concerns? Dryness, Thinning, Damage, Frizz
    Rated 5 out of 5 stars
    1/7/26
    Would recommend!

    I’ve been a huge fan of Necessaire’s rosemary products and the leave-in mask did not disappoint! I like how the scent is very natural and the hair mask is pretty light weight. I also noticed my hair looks shinier and less dry after using! Perfect with pairing it with their rosemary shampoo + conditioner and their rosemary hair serum.

  • Rachael W.
    Verified Buyer
    Reviewing
    Rosemary Leave-In Mask
    I recommend this product
    What are your skin concerns? Acne, Dryness
    What are your hair concerns? Frizz
    Rated 5 out of 5 stars
    1/6/26
    Smells incredible and works so well!

    I used this for the first time and immediately was obsessed! It makes my hair feel so silky smooth and soft and as a bonus it stayed that way for several days! This will become part of my weekly routine to keep my hair shiny and smooth and it smells INCREDIBLE!!!

  • Kristina L.
    Verified Buyer
    Reviewing
    Rosemary Leave-In Mask
    I recommend this product
    What are your hair concerns? Thinning, Frizz, Dryness
    Rated 5 out of 5 stars
    1/3/26
    Favorite product!!!

    I absolutely loved the Rosemary Leave-In Mask. As someone with very fine hair, I’m usually cautious with leave-in treatments, but this one truly impressed me. It’s incredibly lightweight, not heavy at all and doesn’t weigh my hair down. In fact, I’ve been using it instead of my regular conditioner after showering because it leaves my hair feeling so soft, smooth, and healthy without any residue.

    After just a few uses, my hair feels stronger, looks shinier, and overall feels healthier. It absorbs beautifully and delivers nourishment without compromising volume, which is huge for fine hair.

    This has easily become a staple in my routine, and I’m excited to keep using it.