















Plump + Juicy Lip Booster
Buttery Treatment
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Full, cushiony, smooth like butter.
Clean, buttery treatment packed with rich, concentrated fatty acids + lip-boosting actives for your smoothest, fullest, most cushiony lips ever.
- Peptides
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Visibly firms + smooths
- Plump Oleoactif
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Visibly strengthens + plumps
- Hyaluronic Acid
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Hydrates
- Concentrated Fatty Acids
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Soothes + softens
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Wear this buttery treatment at night and/or when getting ready for your smoothest, fullest, most cushiony lips. If layering with lip color, blot excess before applying.
We do not use any plumping irritants so the product is clean, comfy and sting-free.
We recommend waiting until Lip Booster is fully absorbed and blotting excess before applying lip color.
Not at all! It has a smooth, buttery texture with natural emollients that’s never sticky or greasy.
Yes!
Absolutely! This treatment is packed with rich, concentrated fatty acids to smooth, soften and hydrate for the ultimate lip care. In a clinical study, 94% of consumers said this product soothed my chapped, dry, flaky lips after overnight use.
94% agreed my lips are:
- More moisturized
- Smoother
- Softer
- Less flaky
- Less irritated
- Soothed
* based on a consumer study of 33 women applying booster overnight
Pairs Best With

Plump + Juicy Vegan Collagen Spray-On Serum
Powerhouse treatment softens, smoothes + hydrates
The ultimate lip care to instantly replenish lips and promote moisture retention while visibly reducing the look of lines and wrinkles. Soothes dry, flaky lips.




7x more lip-boosting actives*
Hyaluronic acid, peptides, and plumping botanicals help visibly strengthen, redensify, and contour–leaving lips in the best shape ever. The plumper, the better.
*when compared to Kosas Wet Oil Lip Gloss
Super clean + comfy
Smooth, buttery texture with natural emollients that’s never sticky or waxy.


Kosas Clean
Vegan. Gluten-free. Cruelty-free. Free of petroleum derivatives and plumping irritants.
Check out our Kosas Clean page for the full list.


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This product just feels wonderful on your lips! It feels moisturized, without feeling greasy. Love this!
Was this helpful? - KLKatalina L.Verified BuyerAge Range 55 - 64Astrology Fire — Aries; Leo; SagittariusHair Color BlondSkin Tone LightSkin Type DryRecommend Yes -1000%1 month agoAge Range 55 - 64Astrology Fire — Aries; Leo; SagittariusHair Color BlondSkin Tone LightSkin Type DryRecommend Yes -1000%Rated 5 out of 5 starsFav!
Use it at night and wake up plumped
Was this helpful? - DDevanVerified ReviewerAge Range 35 - 44Astrology Water — Cancer; Scorpio; PiscesHair Color BrownSkin Tone FairSkin Type OilyRecommend Yes -1000%1 month agoAge Range 35 - 44Astrology Water — Cancer; Scorpio; PiscesHair Color BrownSkin Tone FairSkin Type OilyRecommend Yes -1000%Rated 5 out of 5 starsLove it
Makes my lips feel and look so good!
Was this helpful? - JKJohnna K.Verified BuyerAge Range 55 - 64Astrology Water — Cancer; Scorpio; PiscesHair Color BrownSkin Tone FairSkin Type NormalRecommend Yes -1000%2 months agoAge Range 55 - 64Astrology Water — Cancer; Scorpio; PiscesHair Color BrownSkin Tone FairSkin Type NormalRecommend Yes -1000%Rated 5 out of 5 starsOmg! This is the best lip serum/balm ever!!
I love the way it makes my lips feel. I use a little as a gloss over lip stain and more at night to really improve the look and feel of my lips.
Was this helpful? - MMorganVerified ReviewerAge Range 25 - 34Astrology Fire — Aries; Leo; SagittariusHair Color BrownSkin Tone FairSkin Type CombinationRecommend Yes -1000%2 months agoAge Range 25 - 34Astrology Fire — Aries; Leo; SagittariusHair Color BrownSkin Tone FairSkin Type CombinationRecommend Yes -1000%Rated 5 out of 5 starsLOVE
I absolutely love this product! I received a free mini with an order I recently purchased and it will be replacing my current go-to lip product. It’s hydrating, and lasts a long time. Kosas has done it again :)
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