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Fills thinning spots in 10 seconds
Undetectable, looks like real hair
Sweat & waterproof, 48H hold
Works on crown, hairline & beard
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+ FREE
30-Day money back guarantee
Excellent
HAIR DENSITY FILLER
BESTSELLER
Fills thinning spots in 10 seconds
Undetectable, looks like real hair
Sweat & waterproof, 48H hold
Works on crown, hairline & beard
Subscribe and save 20%
No contracts, easy to cancel
Choose your shade
Find your shade
30-Day money back guarantee
Selling out fast
89% sold
Due to high demand, limited quantities available
Ends in 00:00:00
Will my scalp & hair stay healthy?
Yes. The fibers are non-comedogenic and rest on your hair and scalp without clogging pores or interfering with hair growth. No harsh chemicals, no residue — it washes out completely with regular shampoo.
Will it look obvious?
No. The fibers bond to your existing hair and mimic real hair density, making them undetectable — even up close, even when your barber is 6 inches from your head. It looks like your hair, just fuller.
How do I pick the right shade?
Pick the shade closest to your natural hair color — the fibers blend into surrounding hair, so each shade covers a wide range. You can even combine shades for a perfect match.
Still not right? You’re covered by our Free Shade Swap Guarantee: we’ll send you a new shade or give you a full refund, no questions asked.
How to apply?
1. Start with dry hair
Towel-dry and style your hair as usual — fibers grip best on dry hair.
2. Shake over thinning spots
Hold the jar 10 cm above the area and shake gently over your crown, hairline, or temples.
3. Pat & set
Pat lightly so the fibers lock onto your hair. Optionally finish with hairspray for extra hold.
4. Build if needed
Add a little more for extra density, while keeping a natural look.
Shipping & Returns
Free shipping from $65.
Please allow the following shipping times:
Standard shipping (4–7 business days)
Express shipping (3–6 business days)
Triple Guarantee:
30-day money back
Wrong shade? Free swap
Lost package? Free replacement
See return page for our conditions and rules
Ingredients
[PLACEHOLDER — replace with your full ingredient list, e.g. natural keratin fibers, mineral colorants]
NETTO CONT. 22G / 0.78 OZ
HAIR DENSITY FILLER
$39.99 USD
$39.99 USD
before & after
REAL RESULTS
Real men, real thinning spots — filled in seconds.
before
after
Crown
My barber took these in the chair. Two shakes and the whole crown was gone from sight.
Tom V.
Verified buyer
before
after
Temples
Use it on my temples where it's thinning. Blends right in with the rest — survived the gym and the rain.
James R.
Verified buyer
before
after
Crown
Shook it over my crown, patted it down, done. My barber didn't even notice until I told him.
Mark T.
Verified buyer
before
after
Hairline
Even under flash light my hairline finally looks solid again.
Jesse K.
Verified buyer
before
after
Hairline
Ten seconds in the mirror and my hairline looks like it did five years ago.
Daniel K.
Verified buyer
before
after
Crown
Blends into my coils like it grew there. Works perfectly with the fade.
Andre M.
Verified buyer
before
after
Part line
My part kept getting wider every year. Now it's ten seconds in the morning and I forget about it.
Chris B.
Verified buyer
before
after
Crown
Survives every workout. Sweat, towel, shower steam — still in place when I walk out.
Ruben S.
Verified buyer
before
after
Full top
Grey hair, 55 years old. My wife noticed the same morning — in a good way.
Willem D.
Verified buyer
*Results from 1 month consumer testing on 50 men between 18-45 years old.
how to use
If you can open a jar, you're qualified.
A routine so simple you'll feel like you're cheating. 10 seconds, every morning.
Pro tip: finish with a light mist of hairspray for maximum hold.
how it works
grip-lock fibers, explained
Three things working together to create the most natural, longest-lasting hair filler we could make.
Natural fibers
Statically charged fibers bond to your existing hair and build visible density in seconds.
Mineral colorants
Match your natural hair color and blend invisibly with the surrounding hair — in 5 shades you can combine.
Scalp-safe finish
Non-comedogenic and residue-free. Won't clog pores or affect hair growth, washes out with regular shampoo.
why klyr
KLYR vs. others
Blends with your natural hair color
Sweat & waterproof for 48 hours
Undetectable, even up close
Won't clog pores or affect hair growth
Works on crown, hairline & beard
Free Shade Swap Guarantee
Others
the results
What men are saying
100%
Instantly fuller hair
Agreed their thinning spots were filled the moment they applied it.
96%
Undetectable up close
Said no one could tell they were wearing anything — not even their barber.
94%
All-day hold
Said it stayed put through work, workouts, sweat and rain.
*1 month consumer testing on 50 men between 18-45 years old.
risk-free
Try it for 30 days. If you don't see thicker hair, you don't pay.
Test it at work, at the gym, in the rain. Not convinced? Let us know and you'll get every cent back — no questions, no hassle.
30-day money back
Wrong shade? Free swap
Lost package? Free replacement
you’ve got questions
we’ve got answers
What exactly is it?
Hair Density Filler is a jar of microscopic, statically charged fibers that bond to your existing hair. Shake it over thinning areas and they instantly create the look of thicker, denser hair. It’s not a dye, not a spray — and it washes out with regular shampoo.
What if I’m completely bald in some areas?
The fibers need some existing hair to grip onto — even short or fine hairs work. On completely smooth, bald areas the effect will be limited. For thinning spots, receding hairlines, crowns, and patchy beards, it works perfectly.
Will it look natural?
Yes. The fibers mimic real hair density and blend with your own color, making them undetectable — even up close. If you can open a jar, you’re qualified.
Will it stay in place all day?
The fibers are sweat & water resistant for up to 48 hours. Rain, workouts, wind — we dare your lifestyle to break it. Regular shampoo takes it out instantly.
Will it clog pores or affect hair growth?
No. The fibers are non-comedogenic and rest on your hair and scalp without clogging pores or interfering with hair growth. You can use it every day.
How long does one jar last?
With daily use on a typical thinning spot, one jar lasts about 1–2 months. That’s less than a coffee per week for a full head of hair.
What if I choose the wrong shade?
Pick the shade closest to your natural color — shades blend with your own hair, and you can combine them for a perfect match. Still not right? Our Free Shade Swap Guarantee means we’ll send a new shade or refund you, no questions asked.