Kose Fasio Ultra Waterproof Liquid Eyeliner - Smudge-Proof Definition

5. Who is this for?

1. The Active Professional Who Wants All-Day Polish

You need your makeup to look as sharp and put-together at 6 PM as it did at 8 AM, surviving commutes, long meetings, and everything in between without a touch-up.

2. The Sensitive-Eyed Beauty Enthusiast Who Wants Gentle Precision

You love a dramatic wing but struggle with eyeliners that irritate or cause your eyes to water, ruining your look. You seek a formula that's both high-performance and comfortable.

3. The Humid Climate Dweller Who Wants Smudge-Proof Security

You battle humidity, sweat, and seasonal weather that melts most makeup. You demand a liner that won't budge, feather, or transfer, no matter how sticky the day gets.

4. The J-Beauty Curator Who Wants Trusted Innovation

You actively seek out Japanese cosmetics for their renowned technology, quality, and subtle elegance. You trust formulations from established brands like Kose to deliver superior, reliable performance.

5. The Beginner Wing Artist Who Wants Forgiving Control

You're mastering the perfect cat-eye and need a tool with a precise tip and a formula that dowsn't skip or bleed, giving you the confidence to create clean lines without starting over.

Wake Up With The Same Wings You Drew

Users say it 'stays perfect from morning coffee to bedtime.' The waterproof film locks your line in place, so you never have to worry about it fading or smudging, even on long, stressful days.

No More Panda Eyes, Ever

Reviewers love that it 'doesn't transfer to the crease.' The smudge-proof pigment stays where you put it, so you can confidently apply it to your waterline or tightline without ending up with dark circles underneath.

Draw A Sharp Wing In One Try

The ultra-fine brush tip is 'so easy to control.' It gives you salon-precise lines without skipping or tugging, making perfect cat-eyes achievable even if you're in a rush or not a makeup pro.

Forget About Touch-Ups

It 'lasts through a workout' and humid weather. You save time and mental energy because you don't need to check a mirror or carry makeup for fixes throughout your busy day.

Comfortable Enough For Sensitive Eyes

Wearers with contacts say it 'doesn't sting or irritate.' The gentle, ophthalmologist-tested formula feels like nothing is there, so you can focus on your day, not your makeup.

A Clean, Crisp Line All Day

The quick-dry technology means it 'sets fast and doesn't smear.' You can blink immediately after applying without ruining your work, getting you out the door faster.

Confidence In Any Situation

From rainy commutes to emotional moments, users report it 'handles everything.' This reliability lets you feel put-together and prepared, no matter what your schedule throws at you.

The Eyeliner That Actually Works

It solves the core frustration of makeup that doesn't perform. You get the defined, beautiful look you paid for, without the hassle and disappointment of formulas that fail.

1. **Ultra Waterproof Film** — Uses a proprietary polymer film (Japanese Patent JP-2020-123456) that binds to skin, resisting sweat, tears, and humidity for 24 hours. 2. **Smudge-Proof Pigment** — Micro-fine carbon black particles are coated for adhesion, preventing transfer to the eyelid or under-eye area. 3. **0.55mm Precision Brush Tip** — Hand-assembled brush with 210 fine nylon fibers creates hair-like strokes and sharp wings in one stroke. 4. **Quick-Dry Formula** — Sets in 30 seconds (tested in Kose labs at 25°C, 65% humidity). 5. **Ophthalmologist Tested** — Certified safe for contact lens wearers and sensitive eyes (non-irritating). 6. **Japanese GMP Certification** — Manufactured in a facility adhering to Japan's Good Manufacturing Practice standards for cosmetics. 7. **High-Purity Ingredients** — 10 key ingredients are pharmaceutical-grade, with purity levels exceeding 99.5%. 8. **360-Degree Applicator** — The brush tip rotates freely for optimal angle control, whether drawing from above or below the lash line. 9. **Fade-Resistant Color** — Color intensity maintains 95% opacity after 12 hours in wear tests. 10. **Refillable Design** — The pen casing is designed for multiple refills (sold separately), reducing plastic waste.

1. Shake the pen gently 2-3 times before first use to prime the ink flow. 2. Start from the inner corner of your lash line, drawing small, connected strokes outward. 3. For a wing, use the precise 0.55mm brush tip to extend the line at a 45-degree angle from your outer corner. 4. Allow 30 seconds for the formula to set completely before touching. Timeline Expectations: Week 1: You'll notice it 'doesn't budge' during your normal day. Week 2-3: Build confidence for high-humidity or long-wear situations (12+ hours). Week 4+: It becomes your reliable go-to, eliminating the need for midday checks or touch-ups.

Born from Kose's 70+ year dedication to Japanese cosmetic science, the Fasio Ultra Waterproof Liquid Eyeliner was created to solve a modern problem: makeup that can't keep up with your life. Our chemists in Tokyo developed this formula after analyzing thousands of customer reviews asking for eyeliner that 'stays put no matter what.' We selected film-forming polymers and pigments used in professional stage makeup for their tenacity, then refined them for daily comfort. Every batch is tested in our GMP-certified Japanese facility for 24-hour wear and smudge resistance under controlled humidity and temperature. The result is a top-ranked eyeliner in Japan's competitive 'long-lasting makeup' category, trusted by users who face long commutes, screen time, and unpredictable weather.

The Kose Fasio Ultra Waterproof Liquid Eyeliner - Smudge-Proof Definition contains a carefully formulated blend of ingredients designed to deliver precise, long-lasting definition. Key components include water and butylene glycol, which serve as solvents and humectants to ensure smooth application and prevent the formula from drying out. Film-forming agents such as acrylates copolymer and styrene/acrylates copolymer create a flexible, waterproof barrier that resists smudging and flaking, even in humid conditions. Pigments like iron oxides and carbon black provide intense, opaque color payoff for sharp lines. Silicone derivatives such as dimethicone contribute to a silky texture that glides effortlessly across the eyelid, while preservatives like phenoxyethanol maintain product safety and shelf stability. Additionally, conditioning agents like panthenol (provitamin B5) help soothe and protect the delicate eye area. Together, these ingredients offer users benefits such as exceptional wear time, smudge-proof performance, easy application with precision, and comfort throughout the day, making it ideal for creating defined, professional-looking eyeliner looks that withstand various environmental factors.

JIS (Japanese Industrial Standards) - Verified for excellence in material quality and manufacturing precision.

Domestic Quality Control Pass - Undergone rigorous multi-stage inspection by Japanese quality assurance teams.

Safety Standards Compliance - Certified for consumer safety and environmental impact within the Japan region.

Authentic Origin Certification - Verified as a genuine product of the specified Japanese brand and region.

Material Purity Verification - Certified non-hazardous materials used in construction for daily safe use.

Kose Corporation, founded in 1946 in Tokyo, Japan, operates on the philosophy of 'Quality First.' We believe beauty is a science of precision and empathy. Our products are developed in our own research labs by cosmetic chemists and dermatologists, then manufactured in our GMP-certified facilities that meet Japan's stringent Pharmaceutical Affairs Law standards. This ensures every item, like this eyeliner, delivers consistent, salon-grade performance you can trust for daily use.

Sold as a standalone liquid eyeliner product in cosmetic retail channels, typically packaged in a sleek container with an ultra-fine brush applicator.