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Clean Longwear Mascara
Free Shipping on US Orders $40+ & Free Returns
Longwear Formula,Big Fluffy Lashes
A clean mascara for instantly big, fluffy lashes powered by hair care serum that helps support stronger, healthier lashes. Newly reformulated to wear for 12 hours.
Clinically tested. Ophthalmology tested. Safe for sensitive eyes. Non-irritating. Hypoallergenic.
- Castor Oil
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Helps lashes reach full growth potential
- Provitamin B5
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Helps revive lashes
- Biotinoyl Tripeptide-1
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Supports healthier, fuller hair
- Plant-Based Sugars
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Provides longwear without microplastics
I absolutely love this mascara. It made my non existent lashes reappear and the bottom baby lashes pop!!! It lasted all day without any smudges. Dare I say I found my Holy Grail of Mascara
My new favorite mascara! I’ve noticed that my eyelashes are longer (I wasn’t sure that was possible!), thicker, and super fluffy! The formula is clean so it’s gentle on my eyes (even with contacts), doesn’t clump, and lasts all day long. Not to mention, it’s formulated to help with eyelash growth. It has everything you need and more in a mascara.
The Big Clean is my new favorite go to mascara. It has everything I’m looking for in an everyday staple. Environmentally conscientious. Long wearing. Lash thickening. I would ten thousand percent recommend this product to any and every one and I will continue to purchase this mascara in the future as well.
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Press the brush into the base of your lashes and wiggle it upward, with the curve of the brush following the natural curve of your eye.
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For more natural-looking volume, apply one coat. For a more dramatic effect, wait 30 seconds and apply another coat.
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Pairs well with 10-Second Eyeshadow for a quick, easy, full eye look.
The Big Clean is not waterproof, but is clinically proven to wear for 12 hours.
It’s a weightless, creamy texture for optimal pairing with a twisted wire brush.
This multi-benefit mascara promotes length, volume, and curl to the lashes.
Natural body-building ingredients including botanical waxes allow this mascara to be super volumizing, and a combination of emulsifiers help make it creamy and clump-free.
The best way to use The Big Clean is to press the brush into the base of your lashes and wiggle it through, with the curve of the brush following the natural curve of your eye.
This is clean mascara like you’ve never seen before. The Big Clean instantly delivers big, bold lashes without commonly used acrylates, carbon black, mineral oil, fragrance or silicones. It’s also powered by haircare actives so lashes can reach their full growth potential. It’s like lash extensions and lash serum in a bottle.
87% did not experience smudging
Long wearing for 12 hours
100% saw longer, thicker, lusher lashes*
*Based on a consumer study with 33 women after using The Big Clean for 2 weeks
Clinically tested. Ophthalmology tested.
Safe for sensitive eyes. Non-irritating. Hypoallergenic.
Beauty Innovator Awards, Refinery29 (2020)
Pairs Best With
100% Saw Longer, Thicker, Lusher Lashes
Get max volume and separation with the cleanest ingredients. Biodegradable plant-based sugars replace traditionally used microplastics for a longwearing formula + big, fluffy, lash-extension impact.




Big Lash Energy
Natural body-building ingredients and pure, intense pigments deliver a big lash vibe. The oversized curved brush (like a rainbow) has flexible-yet-firm spiraled bristles that volumize, lengthen, separate, and curl lashes all the way up.
Powerful Hair Care Serum For Clinically Proven Results
The active formula nourishes and protects to support stronger, healthier lashes over time. Every swipe helps lash hairs reach their full growth potential.


See It In Action
A few before & afters of The Big Clean. Your lashes, but bigger.





Kosas Clean
Cruelty-free and gluten-free. Formulated without: carbon black, acrylates, mineral oil, talc, silicones, fragrance, parabens, sulfates, and phthalates.
Check out our Kosas Clean page for the full list.


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I love this product so much, I just WISH it was waterproof. If they made the same exact mascara that was waterproof- this product would be top-notch. It does last all day, which is wild, but I do see smudging and residue that occurs under my lower eyelashes as the day gets longer. I also don’t put mascara on my lower lashes. Please make this waterproof so it doesn’t do that!
Was this helpful? - TRTay R.Verified BuyerAge Range 25 - 34Astrology Water — Cancer; Scorpio; PiscesHair Color BrownSkin Tone LightSkin Type CombinationRecommend Yes -1000%3 weeks agoAge Range 25 - 34Astrology Water — Cancer; Scorpio; PiscesHair Color BrownSkin Tone LightSkin Type CombinationRecommend Yes -1000%Rated 3 starsThick and clumpy.
Did I get a bad one? I don’t know. It’s thick and chunky like when you own a mascara for about 2 months. I do like the wand though.
Was this helpful?KCKosas Cosmetics3 weeks agoHi Tay, We're so sorry to hear this. Please email us at LetsChat@Kosas.com and we can assist.
- GHGina H.Verified BuyerAge Range 55 - 64Astrology Water — Cancer; Scorpio; PiscesHair Color BrownSkin Tone LightSkin Type DryRecommend Yes -1000%1 month agoAge Range 55 - 64Astrology Water — Cancer; Scorpio; PiscesHair Color BrownSkin Tone LightSkin Type DryRecommend Yes -1000%Rated 5 starsLoucious Lashes
This mascara gives me loucious lashes. It's vloumizing, lengthening and long lasting. It doesn't flake or smudge and lasts all day. This is my go to mascara, love to pair in with the 10 second eyeshadow.
Was this helpful? - AUAileen U.Verified BuyerAge Range 55 - 64Hair Color BlondSkin Tone FairSkin Type NormalRecommend Yes -1000%1 month agoAge Range 55 - 64Hair Color BlondSkin Tone FairSkin Type NormalRecommend Yes -1000%Rated 5 starsAwesome mascara
This is the best mascara. I’ve tried so many over the years and none compare. Great volume and length.
Was this helpful? - AAndreaVerified BuyerAge Range 35 - 44Skin Tone FairRecommend Yes -1000%1 month agoAge Range 35 - 44Skin Tone FairRecommend Yes -1000%Rated 3 starsMy eyes were happy, now a bit less so
Originally loved, 5 stars and my sensitive eyes were so happy! Then the formula seems to have gotten an update to be longer wear? Now it irritates my eyes and can only wear for a short time, bummer!
Was this helpful?