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Kiierr Hair Building Fibers
Get instant, natural looking fullness with Kiierr Hair Building Fibers. Perfect to use while staying consistent with your laser cap as you wait for visible regrowth results.
Hair Color -
Black
Dark Brown
Med Brown
Light Brown
Med Blonde
Gray
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Kiierr Daily Shampoo & Conditioner
$49.98
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Description
Kiierr Hair Building Fibers are ultra-fine keratin-based hair fibers that instantly conceal thinning areas for a fuller, natural-looking head of hair. These micro fibers cling to your existing strands using static attraction and anti-static treatments so they blend seamlessly without looking powdery or fake. The result is natural fullness from the moment of application. They are ideal for daily use and are especially helpful while waiting for long term regrowth results from a laser cap.
How It Works
Kiierr Hair Building Fibers use micro fibers that carry a natural static charge. When applied to dry hair, the fibers attach to existing strands and build density exactly where hair looks sparse. This creates the appearance of thicker hair instantly without affecting the scalp or hair follicles.
How to Use
Start with clean, dry, styled hair. Gently shake the fibers over thinning areas. Use fingertips to lightly pat and blend for an even finish. For extended wear, a light holding spray can be applied. Wash out easily with shampoo and water.
Size: 23g
Designed for men & women
6 color options for natural blending
For cosmetic use only
Rinses out with shampoo
Shipping & Returns
Free shipping within the U.S. (arrives in 3-5 business days after processing time)
International shipping available; duties may apply.
Returns on unused products are accepted within 7 days of delivery.
AS SEEN IN
See real before & afters from Kiierr customers who achieved instantly fuller, thicker looking hair using Kiierr Hair Building Fibers.
I have been using the Kiierr hair fibers in dark brown and they have been great for my confidence. They blend naturally and instantly make my hair look fuller without looking fake.
Richard K | Medium Brown
I am in my 60s and have light blonde hair, and I was nervous about finding fibers that looked natural. I use the fibers along with my laser cap, which helps me feel better while my hair is growing back.
Angela C | Medium Blonde
I have gray hair and thinning spots. These hair fibers work great with my hair color and give instant fullness that looks like my natural hair. They are easy to apply and do not feel heavy.
Roger A | Gray
Why should I use Kiierr’s hair fibers?
Kiierr Hair Building Fibers instantly bond to existing hair to create the look of thicker, fuller coverage in thinning areas. They blend naturally, stay in place throughout the day & help boost confidence right away without changing your routine.
What exactly are hair building fibers?
Kiierr Hair Building Fibers are cosmetic micro fibers designed to attach to your existing hair strands and instantly create the appearance of thicker, fuller hair. They are not a spray dye or powder. Each fiber mimics the look and movement of real hair, allowing sparse areas to look naturally filled in rather than covered up
How do they actually work?
The fibers carry a natural static charge that helps them bond to existing hair strands. Once applied to dry hair, they wrap around each strand and build visual density in thinning areas. This process happens immediately and does not interfere with the scalp or hair follicles.
Do these fibers help grow hair?
No. Kiierr Hair Building Fibers are not a growth treatment. They are a cosmetic solution designed to improve appearance instantly. Many people use them while waiting for results from long term solutions like laser caps. They help bridge the gap between starting treatment and seeing visible regrowth.
Can I use them with my laser cap?
Laser cap therapy works gradually and requires consistency over several months. Hair fibers allow you to look and feel confident during that waiting period. They do not block the scalp, do not affect follicles, and rinse out easily, making them a great visual companion to a laser cap routine.
Will the fibers look obvious or fake?
When matched correctly to your hair color and applied lightly, the fibers blend seamlessly with natural hair. They are designed to look like real strands rather than makeup on the scalp. Using less product and building gradually helps achieve the most natural result.
How long do the fibers stay in place?
Under normal daily conditions, the fibers stay in place until washed out. Light wind, regular movement, and everyday activity are not an issue. Heavy sweating or rain may reduce hold, which is why some users choose to apply a light setting spray for added security.
What are they made from?
Kiierr Hair Building Fibers are made from ultra fine cosmetic grade micro fibers designed to mimic the look and feel of real hair. They are formulated for surface level use only, meaning they sit on the hair strands rather than absorbing into the scalp. The fibers rinse out completely with shampoo and do not interfere with hair growth treatments or the natural hair cycle.
How do I choose the right color?
Kiierr Hair Building Fibers are available in 6 shades: black, dark brown, medium brown, light brown, medium blonde, and gray. For the most natural result, choose the shade closest to your root color rather than the ends of your hair. If you are between shades or have multi tonal hair, blending 2 colors can create an even more seamless match.
4.9 (645 reviews)
Richard K.
I have been using the Kiierr hair fibers in dark brown and they have been great for my confidence. They blend naturally and instantly make my hair look fuller without looking fake. I am also using a laser cap to regrow my hair, and the fibers let me feel comfortable and put together while I wait for real growth. No mess, easy to apply, and they stay put all day. I finally feel confident again. The color match is perfect and it looks completely natural.
Amy R.
After having my baby, I started dealing with postpartum thinning and it really affected my confidence. I just started using the laser cap and know results take time, so I picked up the hair fibers to help in the meantime. I use the dark brown shade and it blends really well with my hair. It instantly makes my thinning areas look fuller and more even.
Angela C.
I am in my 60s and have light blonde hair, and I was nervous about finding fibers that looked natural. I use the fibers along with my laser cap, which helps me feel better while my hair is growing back. They apply easily stay in place all day and look completely real. I feel more like myself again. It has made getting ready each morning much easier and far less stressful overall.
Mark T.
I am a guy in my early 40s and thinning at the crown. I use the light brown hair fibers on workdays and nights out, and they blend easily with my hair. I am also consistent with my laser cap, so the fibers help me feel confident while I wait for growth. They stay put, look natural in normal lighting, and wash out cleanly at night without irritation. Application is quick, mess free, and fits my routine without extra steps daily.
Robert A.
I have gray hair and thinning spots. These hair fibers work great with my hair color and give instant fullness that looks like my natural hair. They are easy to apply and do not feel heavy. I feel great leaving the house while my hair continues to improve. Friends have noticed the difference and keep asking what changed.
Lillian A.
My hair has become very thin over the years. The Kiierr gray hair fibers have made such a difference for me. They blend beautifully with my natural color and cover thin areas right away. I feel comfortable wearing them every day, especially while I continue using my laser cap. They help me feel put together and confident again without looking obvious or messy. At my age, simple solutions that look natural truly matter to me every day.
Mark L.
I am in my early thirties and started using these hair fibers to fill in thinning areas. The color blends with my black hair and looks natural in any light. It gives good coverage and is easy to apply without mess for daily wear or special occasions. I will definitely keep buying and am on a subscription plan.
Brad K.
I chose the medium brown fibers to fill in thinning spots, and the result was immediate. They blended naturally with my hair and stayed put all day. I feel more confident leaving the house, especially while I keep up with my laser routine and wait for real regrowth to come in. No mess, no shine, just fuller looking hair.
Kathy B.
I have naturally reddish brown hair and was a little nervous about finding the right shade, but the medium brown hair fibers worked surprisingly well. Once I applied them, my thinning areas looked fuller right away without looking fake or obvious. The fibers stayed all day and felt light, not heavy or itchy. I love that they give me instant confidence while I am working on long term hair growth. It feels good to look in the mirror again and actually like what I see. I am very happy with this product.
Stacy J.
I use these hair fibers and they work perfectly for me. I have blonde hair with darker roots, so I chose medium brown and it blended so naturally. It filled in sparse areas instantly and looked soft and realistic!
I have naturally reddish brown hair and was a little nervous about finding the right shade, but the medium brown hair fibers worked surprisingly well. Once I applied them, my thinning areas looked fuller right away without looking fake or obvious. The fibers stayed all day and felt light, not heavy or itchy. I love that they give me instant confidence while I am working on long term hair growth. It feels good to look in the mirror again and actually like what I see. I am very happy with this product and have already ordered more!
I am in my 60s and have light blonde hair, and I was nervous about finding fibers that looked natural. I use the fibers along with my laser cap, which helps me feel better while my hair is growing back. They apply easily stay in place all day and look completely real. I feel more like myself again. It has made getting ready each morning much easier and far less stressful overall. I definitely recommend this