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.
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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- TSTracey S.Verified BuyerAge Range 35 - 44Astrology Fire — Aries; Leo; SagittariusHair Color BrownSkin Tone FairSkin Type DryRecommend Yes -1000%10 seconds agoAge Range 35 - 44Astrology Fire — Aries; Leo; SagittariusHair Color BrownSkin Tone FairSkin Type DryRecommend Yes -1000%Rated 5 out of 5 starsLove this mascara!
I read that this has been reformulated, but I am new to Kosas so I can’t speak to that. What I can say is this wand and this formula are so easy to use and make my lashes perfectly separated and gorgeous! I have short straight lashes, but this makes them look long and lifted. Works as well as Ilia, but I like this wand better for sure. Easily washes off, no fallout, and no clumps. You can really build it, but I use just one coat and am ready to go.
- KSKrista S.Verified BuyerAge Range 45 - 54Hair Color BrownSkin Tone LightSkin Type OilyRecommend Yes -1000%1 month agoAge Range 45 - 54Hair Color BrownSkin Tone LightSkin Type OilyRecommend Yes -1000%Rated 5 out of 5 starsLove the formula
I really like this formula! Have already noticed a difference in my eyelashes growing in thicker after just using this for a few weeks.
- KCKimberly C.Verified BuyerAge Range 35 - 44Hair Color BrownRecommend Yes -1000%1 month agoAge Range 35 - 44Hair Color BrownRecommend Yes -1000%Rated 5 out of 5 starsLove the mascara
Love it. Doesn’t clump and barely transfers. I have Asian eyes that are oily and mascara always ends up everywhere around my my eyes. So I’m happy that this one barely transfers.
- CGCarmin G.Verified BuyerAge Range 25 - 34Hair Color BrownSkin Tone MediumSkin Type CombinationRecommend Yes -1000%2 months agoAge Range 25 - 34Hair Color BrownSkin Tone MediumSkin Type CombinationRecommend Yes -1000%Rated 5 out of 5 starsPerfect
This has a really good balance between wet and dry…I curl my eyelashes and this goes on smooth, but not super wet, so it holds things up well. This is my third bottle and I’m pretty sold.
- EBErin B.Verified BuyerAge Range 25 - 34Astrology Air — Gemini; Libra; AquariusHair Color BrownSkin Tone MediumSkin Type NormalRecommend Yes -1000%2 months agoAge Range 25 - 34Astrology Air — Gemini; Libra; AquariusHair Color BrownSkin Tone MediumSkin Type NormalRecommend Yes -1000%Rated 5 out of 5 starsMakes a big difference
While some are saying this causes clumpy lashes, I have not had that experience. I have bought three tubes of this mascara now, and I love it every time. It doesn't make my eyes burn, and it provides definition, length, and volume. I'll never buy anything else. I don't know if it helps that I start at the base of my lashes and give a gentle wiggle side to side and apply one to three coats. I absolutely love it!KCKosas Cosmetics2 months ago
Hi Erin! So happy The Big Clean is giving you fluffy lashes 💗