The Big Clean Mascara - Full-size
The Big Clean Mascara - Mini
The Big Clean Mascara
The Big Clean Mascara
The Big Clean Mascara
The Big Clean Mascara
The Big Clean Mascara
The Big Clean Mascara
The Big Clean Mascara
The Big Clean Mascara
The Big Clean Mascara

The Big Clean Mascara

Clean Longwear Mascara

 (420)
Select Size:
Intense Black
✨ Friends & Family Sale - 20% Off ✨

Free Shipping on US Orders $40+ & Free Returns

Pairs Best With

#shade::taupe #image::vessel
Volumizing treatment gel
✨ Friends & Family Sale - 20% Off ✨

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.

eyelash, waterproof mascara, eyelash curler

Benefits & Ingredients

Castor Oil

Helps lashes reach full growth potential

Provitamin B5

Helps revive lashes

Biotinoyl Tripeptide-1

Supports healthier, fuller hair

Plant-Based Sugars

Provides longwear without microplastics

Review Highlights
Perfect!!

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 

Best clean mascara you can buy!

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.

My Lashes Have Never Looked Better

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.

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.

Clinically Proven Results

Immediately:

87% did not experience smudging

Long wearing for 12 hours

After 2 weeks:

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.

You might also like

3.5
Rated 3.5 stars
Based on 420 reviews
Total 5 star reviews: 117 Total 4 star reviews: 120 Total 3 star reviews: 92 Total 2 star reviews: 49 Total 1 star reviews: 42
56%would recommend this product
420 reviews
  • M
    Magicalgurl
    Flag of United States
    Astrology Air — Gemini; Libra; Aquarius
    Skin Type Dry
    1 week ago
    Astrology Air — Gemini; Libra; Aquarius
    Skin Type Dry
    Rated 5 stars
    Best Lash Care Mascara

    I love the finished look of this mascara. It gives my lashes a more extended appearance and makes them look full-bodied.

    The Kosas Big Clean Mascara has been the only mascara I have used for over a year, and I wear it daily. As a result, my lashes are healthier after using this mascara. In addition, it doesn't flake or irritate my sensitive eyes.

    I hope Kosas will continue to make this clean + lash care mascara and never change the formula because it is perfect.

    Was this helpful?
  • PM
    Paula M.
    Flag of United States
    Verified Buyer
    Astrology Fire — Aries; Leo; Sagittarius
    Skin Type Combination
    1 week ago
    Astrology Fire — Aries; Leo; Sagittarius
    Skin Type Combination
    Rated 5 stars
    I really like this mascara.

    I really like this mascara. My lashes are very straight and this helps keep them in place after using my lash curler and lash primer.

    Was this helpful?
  • TM
    Tracy M.
    Flag of United States
    Verified Buyer
    Astrology Air — Gemini; Libra; Aquarius
    Skin Type Dry
    2 weeks ago
    Astrology Air — Gemini; Libra; Aquarius
    Skin Type Dry
    Rated 4 stars
    Love the application and length

    Love the application and length I got but it transferred

    Was this helpful?
  • AB
    Anya B.
    Flag of United States
    Skin Type Combination
    1 month ago
    Skin Type Combination
    Rated 2 stars
    Not the best

    I love the brand Kosas. I have a lot of their products and have been buying from Kosas since 2017. The mascara really surprised me but not in a good way. Sure, it creates a lot of volume but it’s really messy and clumpy volume. Also, I like when my mascara washes off easily so I’m not damaging my own eyelashes and pulling them out. This mascara is REALLY hard to wash off and even with make up remover it still doesn’t come off well. Because of that I can’t use this. Hopefully a new formula is in the works because I see this product has an average rating of 3.5 which seems really bad for a brand (or for any brand) like Kosas.

    Was this helpful?
  • K
    Kc
    Flag of United States
    Astrology Water — Cancer; Scorpio; Pisces
    Skin Type Combination
    1 month ago
    Astrology Water — Cancer; Scorpio; Pisces
    Skin Type Combination
    Rated 5 stars
    The best clean mascara

    I’m a mascara junkie and this is by far my favorite clean mascara. Trust me I’ve tried them all. This is just effortless perfection. No I didn’t get this for free. I’ve actually spent money on this product again and again.

    Was this helpful?
Reviews LoadedReviews Added