Shade: Trace
Honey beige shimmer
Size: 0.04 oz / 1 g
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Sale price$23.40
Regular price
$26.00
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Finally, a clean long-wear liner that’s safe for sensitive eyes and the waterline. This waterproof, sweatproof formula glides on smoothly without dragging, skipping, or tugging. The rich, saturated color blends effortlessly for diffused definition, then locks in up to 24-hour wear. It’s available in an art-inspired palette of 10 shades, from nuanced neutrals to dimensional jewel tones. The sharpenable pencil is made in part from repurposed coffee chaff—an innovative material that uses would-be waste from the coffee industry. It’s clinically tested on sensitive eyes and the waterline—so everyone can define their signature look.
Dimethicone, Synthetic Wax, Trimethylsiloxysilicate, C20-24 Alkyl Dimethicone, Dicalcium Phosphate, Calcium Sodium Borosilicate, Calcium Silicate, Polyethylene, Phenylpropyldimethylsiloxysilicate, Mica, Linoleic Acid, Linolenic Acid, Persea Gratissima (Avocado) Oil, Tocopherol, Polyhydroxystearic Acid, Synthetic Fluorphlogopite, Disteardimonium Hectorite, Hydrogenated Vegetable Oil, Pentaerythrityl Tetra-Di-T-Butyl Hydroxyhydrocinnamate, Propylene Carbonate, Tin Oxide, Titanium Dioxide (Ci 77891), Iron Oxides (Ci 77491, Ci 77492, Ci 77499), Blue 1 Lake (Ci 42090).
Thru Line Waterproof Eyeliner
Thru Line Waterproof Eyeliner
Up to 24-hour color. Safe for sensitive eyes.
Thoughtfully Formulated
- safe for sensitive eyes + waterline
- ophthalmologist-tested
- dermatologist-tested
Up to 24-hour wear.
Waterproof + sweatproof.
Safe for sensitive eyes.
Safe for the waterline.
Clinical Results
100%said it applies comfortably to lash line + waterline*
98%said it’s blendable + easy to control*
96%said it wears comfortably all day**
90%said it doesn't skip, drag, or tug*
In a consumer perception study of 50 people; immediate results (*) and after 12 hours (**).
Waterproof Eyeliner Ingredients
Omega Fatty Acids
Help support comfortable wear—even on the waterline.
Avocado Oil-Coated Pigments
Combine bold color with smooth, buttery glide.
Color Lock Film Formers
Lock in long-lasting + waterproof wear.
3 Ways to Wear
Line + Define
Sharpen the tip with the Dual Precision Sharpener, then glide along the lash line or waterline.
Smudge + Soften
Blend with the smudger side of the Angled Line + Smudge Brush for a soft, diffused effect. Work on one eye at a time—the formula sets quickly.
Wing It
Use the angled side of the brush to pull color out into a soft wing.
The Art of the Eye
Pair Thru Line with Eye Stylus and Limitless Lash for an artful look.
Paint
Prime your canvas with an all-over wash of Eye Stylus Shadow Stick.
Sketch
Line and define lids with a swipe of Thru Line Waterproof Eyeliner.
Frame
Frame your work of art with lengthening, lifting Limitless Lash Mascara.
Why We Love It
Rich, saturated color that glides smoothly and stays all day—even on sensitive eyes and the waterline.
Founder's Note
“Thru Line locks it all in. It’s long-lasting, it’s waterproof, it doesn’t smudge… even on my sensitive, hooded eyes.”
— Sasha
Recycle or Repurpose
How to keep your empty packaging out of the landfill.
- The outer carton is curbside-recyclable—drop it in your curbside bin.
- Once you’re done with the pencil, discard any shavings or remnants.
- Send the cap and base to Pact. Drop in your nearest collection bin, or download your free shipping label once you collect 10 empties.
FAQ
If we didn't answer your question, contact us.
Yes, Thru Line Waterproof Eyeliner is ophthalmologist-tested and safe for the waterline and sensitive eyes. The pigments are coated in avocado oil, so they glide on smoothly without dragging or tugging the delicate skin along the lash line and waterline. It applies comfortably whether you’re tightlining the upper lash line or lining the inner rim, and it stays put once it sets.
Thru Line is longwear waterproof eyeliner with up to 24-hour wear. Once it sets, the formula is smudge-resistant, transfer-resistant, sweatproof, and humidity-proof. It works well for sensitive eyes, hooded lids, or anyone whose liner tends to fade, smudge, or transfer. Apply and blend any soft or smoked-out looks quickly—after the formula sets, it locks into place for the full wear time.
Yes! Hooded eyes are one of the trickiest shapes for liner because the lid folds down and makes contact throughout the day, which causes most pencils to transfer and smudge. Thru Line is a smudge-resistant, transfer-resistant waterproof eyeliner pencil, so it stays exactly where it is applied. It’s the perfect everyday option for hooded, mature, or deep-set eyes, where long wear matters most.
Thru Line works with most eyeliner application techniques. You can tightline along the upper lash line for subtle definition, line the waterline for depth, draw a thin, precise line for a clean look, or blend it out for a smoky effect. Work quickly on any blended or smudged-out styles—the formula locks in for 24-hour wear once it sets.
Thru Line is formulated with sensitive eyes in mind, not just color. Avocado Oil-Coated Pigments and Omega Fatty Acids give the formula its smooth, tug-free glide for comfortable wear, even on the waterline. It’s also vegan, cruelty-free, and formulated without fragrance, gluten, or talc.
Thru Line comes in 10 shades in matte and shimmer finishes, so you can design everything from a natural daytime look to a lived-in smoky eye. The matte shades are perfect for clean, precise lines and tightlining, while the shimmer shades add subtle dimension along the lash line or inner corner. With shades that ranged from nuanced neutrals to rich jewel tones, there’s a color for most looks, skin tones, and preferences. Every shade is waterproof and safe for sensitive eyes.
Some waterproof eyeliner pencils trade comfort for performance, so they end up dragging, tugging, or irritating sensitive eyes. Thru Line is designed to do both. It combines up to 24-hour wear with an ophthalmologist-tested formula that’s safe for sensitive eyes and the waterline. The pigments are coated in avocado oil for smooth, non-irritating glide, and omega fatty acids help support comfortable wear on even the most delicate skin. The result is a long-wear, smudge-resistant, transfer-resistant liner that feels comfortable to wear.
- CelindaVerified ReviewerI recommend this productSkin Type CombinationSkin Tone CoolUndertone OliveEye Color BrownAge Range 45-54Reviewed by An incentivized reviewerReviewed By An incentivized reviewerThru Line Waterproof Eyeliner GraphiteRated 5 out of 5 stars8/25/26Stays all day
I used this on my waterline and by end of day I still have some on! Doesn’t smudge and give you raccoon eyes.
Was this helpful? - Ann C.Verified BuyerI do not recommend this productSkin Type NormalSkin Tone OliveUndertone OliveEye Color BlueAge Range 55-64Reviewed by An ILIA customerReviewed By An ILIA customerRated 2 out of 5 stars8/25/26Waterproof eyeliner
I’m disappointed too with this product, I didn’t realize you needed a sharpener, the tube is plastic. Doesn’t make any sense. I wasted my money .
Was this helpful? - Nancy H.Verified ReviewerSkin Type DrySkin Tone NeutralUndertone NeutralEye Color HazelAge Range 55-64Reviewed by An ILIA customerReviewed By An ILIA customerRated 3 out of 5 stars8/25/26New eyeliner
I think I wasted $26. I love the eye liner but I did not realize you had to buy a sharpener with it, and honestly, I don’t even see how one can sharpen it. It appears to be all plastic but the very tip. Disappointed.
Was this helpful? - AmyI recommend this productRated 5 out of 5 stars8/25/265 Stars
Awesome!
Was this helpful? - Meeta N.Verified BuyerI do not recommend this productSkin Type NormalSkin Tone NeutralUndertone NeutralEye Color BrownAge Range 45-54Reviewed by An ILIA customerReviewed By An ILIA customerRated 1 out of 5 stars8/24/26Eyeliner ran out too quickly
This ran out in a few weeks. The only ilia product that I’ve been disappointed with. Hope they correct this.
Incentivized reviewThis review was received as part of a promotion or in exchange for an incentive. The incentive was offered to both positive and negative reviews.Was this helpful?
Waterproof Eyeliner for Waterline and Sensitive Eyes
Thru Line Waterproof Eyeliner is a waterproof eyeliner with up to 24-hour wear that’s ophthalmologist-tested and safe for sensitive eyes and the waterline. The formula is smudge-resistant, transfer-resistant, and sweatproof, with Avocado Oil-Coated Pigments that glide on without dragging or tugging. Omega Fatty Acids help support comfortable wear, even on the delicate waterline. Available in 10 shades with matte and shimmer finishes. Vegan, cruelty-free, and formulated without fragrance or gluten. Pair it with Eye Stylus Shadow Stick, Limitless Lash Mascara, or explore the full ILIA eye collection.
