272 DIODES
312 DIODES
302 DIODES
HAIR & SKIN
SKINCARE ESSENTIAL
PATENTED TECH
5 MODELS
4.8/5 Based on 2,000+ Reviews
Proven Results,
Trusted by Thousands
Chosen by 100,000+ men and women to regrow hair and restore confidence!
As seen in
Hard to Believe? See for Yourself.
Photos don’t lie. Our users saw results in as little as 6-8 weeks!
Hair Thinning
Hair Loss
Thinning at Temples
Bald Spots
Receding Hairline
Widening Parts
It’s a worthwhile investment!
I started using my Kiierr cap almost 4 years ago at 63. After the first 6 months or so, I noticed that there was less hair caught by my shower drain strainer than in the past. My temples and the thinning hair on my crown have filled in.
Frank L
My hair is thicker than it’s ever been!
I suffer from hormone-related hair loss. It was devastating to see my hair become thinner & thinner. I have been using Kiierr for 10 months now. At first I was skeptical (was this too good to be true?), but I was astounded when I started seeing growth after 6 weeks!
Denise C
My hair is a lot thicker!
Thicker hair on my crown has been the most noticeable change since starting with Kiierr. Over the last several months, my hair has visibly thickened, especially in areas that were previously thinning.
Mark R
My hair is thicker and fuller!
After contracting COVID, I experienced severe hair loss. I tried the Kiierr Laser Cap and after 5-6 weeks, new hair began growing on my bald spots. By two months, my hair became thicker and fuller. After three and a half months, I was thrilled with the results and highly recommend!
Marsha W
Nothing worked until Kiierr!
After spending 10 years trying other hair growth products, I heard about the success of laser therapy after researching. As you can see, during the 3 year process of using the Kiierr Hat, I could see remarkable results after only 6 months.
James R
The Kiierr Cap really helped!
I've always had thin hair in the crown but 3 months after having Covid, my hair started coming out in handfuls. The Kiierr cap was what helped along with Kiierr’s shampoo, conditioner and biotin.
Karla P
Recommended by my doctor!
I suffered from a mold exposure that caused excessive hair loss, and this treatment was recommended by my doctor. With continued use of the cap, the vascularity of my scalp has improved. The cap has helped significantly in promoting new hair growth.
Jenna P
Reversed my menopause thinning!
Noticeable menopause thinning led me to try Kiierr's hair cap. After using it consistently three times a week for several months, I began to see real results. My hair started growing back. Even my friends & hair stylist noticed the improvement!
Karen N
I love my Kiierr cap!
I use it faithfully and have really seen a difference in my hairline. It was receding on the sides, temples and front, but has definitely stopped and is actually filling in with hair! I would definitely recommend a Kiierr Cap
Lisa L
Kiierr saved my hair!
At 65, my hair started falling and I was nearly bald. I didn’t want a transplant and couldn’t see a doctor during COVID. I tried Kiierr, and it truly helped. Thickened my hair and stopped the loss. I recommend it to everyone facing hair loss.
Jorge V
This cap made me look younger!
After 5 months of using the Kiierr Laser Cap, my hair is fuller, and I feel years younger. I was skeptical at first, but after speaking with their helpful team, I decided to try it. To my surprise, it really works! Plus, their customer service is fantastic. Highly recommend!
Significant hair growth!
I have been using the Kiierr Hair Restoration Cap for the past 18 months. I have received significant hair growth. Attached are my before and after photos showing the hair growth. I highly recommend the Kiierr Cap.
John J
It’s a game-changer for my hair loss
Easy to use cap which I have been using for about 5 years now, every other day. My hair strands have become thicker & have less shedding. I would definitely recommend the Kiierr cap, especially due to the scientific backup.
Vincent R
Highly recommend all Kiierr products!
The laser cap definitely helped regrow hair over the balding spot on the crown of my head and on my thinning/receding front hairline! I also use the Kiierr shampoo, conditioner and vitamins. I highly recommend all Kiierr products!
Dennis F
Amazing for male pattern baldness!
I highly recommend this product to anyone with hair loss. Male pattern baldness started in my 20s with a receding hairline and thinning crown. I have seen awesome results with red light therapy and it was worth every penny.
Seth G.
It really does work!
After using the Kiierr laser cap, I have regrown a large amount of hair. I am so happy with my results and plan to continue use forever! If you are considering Kiierr, I definitely recommend it. It really does work.
Abby A
The Kiierr cap really worked for me!
I purchased the Kiierr cap 4 years ago. I was losing a great amount of hair every time I shampooed. The cap really worked for me. I recently went to my dermatologist and mentioned the cap & he said that “good laser caps really do work!”
Pauline C
Noticeable hair growth with Kiierr!
I was skeptical at first, but after weeks of using the Kiierr Laser Cap, my hair became thicker, and new growth was visible. I’m convinced it works and will keep using it to maintain my results. Thank you, Kiierr!
Manny E
Life-Changing Hair Transformations
See how Kiierr has transformed hair regrowth journeys with real success from real people.
Scientific Proof You Can Trust
Backed by extensive research, Kiierr’s advanced laser technology is clinically proven to stimulate hair growth and combat hair loss effectively.
Clinical Study 1
The Impact of Low-Level Light Therapy (LLLT) on Hair Regrowth
• Research demonstrated a 43% increase in hair growth in 100% of participants within just 9 weeks.
• Findings confirmed that LLLT stimulates dormant hair follicles and prolongs the growth phase for thicker, fuller hair.
Clinical Study 2
Home-Use LLLT Devices Show Significant Hair Growth
• In a meta-analysis of FDA-approved devices, participants using LLLT experienced a noticeable increase in hair density compared to placebo groups.
• This study supports LLLT as a safe, at-home solution for androgenetic alopecia.
Clinical Study 3
Evidence of Effective Hair Density Improvements with LLLT
• Over 90% of study participants reported reduced hair loss and improved hair coverage in just 12 weeks of LLLT treatment.
• Results showed consistent hair follicle stimulation without adverse effects.
Clinical Study 4
24-Week Study on LLLT’s Efficacy for Hair Loss
• A randomized, double-blind trial revealed significant increases in hair thickness and density among LLLT users.
• Findings concluded that LLLT is a highly effective treatment for androgenetic alopecia when used consistently.
1/4
2/4
3/4
4/4
Want to be the next Kiierr success story?
You’ve seen what’s possible! Now take the first step toward your own transformation and let Kiierr help you feel confident in your hair again.
START YOUR JOURNEY NOW
No surgeries
|
No side effects
No pills
Trusted by 125k+ Happy Customers
4.9 (2145 reviews)
Amanda R.
Female Pattern
I started noticing my part getting wider in photos, especially under bright lights. I had tried vitamins and expensive shampoos, but I wanted something that felt more targeted. I chose Kiierr because I liked that I could use it at home without adding another appointment to my schedule. After staying consistent for several months, I started noticing little hairs filling in around my part and my scalp was not as visible. That was the first time I felt like I was actually doing something that was making a difference.
272 Premier
Nicole S.
Diffuse Thinning
My hair has always been very fine, but over the last few years it started looking flat and sparse on top. I was tired of constantly changing my part to hide it. After several months with the cap, I have more little hairs coming in around the top and my normal part does not bother me nearly as much anymore.
Lauren H.
stress
Stress caused me to shed more hair than I ever had in my life. Once things settled down, my density did not seem to bounce back the way I hoped it would.
I started using Kiierr mostly because I wanted a routine that did not involve applying something to my scalp every day. I knew I would never stay consistent with that.
The cap was surprisingly easy to fit into my life. I usually use it while reading before bed. For the first couple months, I really did not notice much. Then I started seeing short hairs sticking up around the top of my head. A few months later, the difference in my part became much more obvious.
The biggest lesson for me was to stop checking every day. Hair growth is slow. Taking photos once a month made it much easier to see the progress.
272 DualWave
Jason P.
genetic
I started early because my dad and both grandfathers lost a lot of their hair. Once I noticed my temples creeping back, I did not want to wait until it became severe. I went with Kiierr because prevention seemed smarter than trying to fix major loss later. So far my hair feels thicker and my hairline has stayed pretty stable. I am happy I started when I did.
312 DualWave
Michael T.
crown thinning
My biggest problem was thinning at the crown. I honestly did not expect much because I had already tried several things over the years. I took pictures before I started with Kiierr and I am glad I did because the change was much easier to see in photos than in the mirror every day. My crown looks noticeably fuller now. Consistency was the biggest thing for me.
302 Ultra Flex
Andrew S.
Crown Thinning
I started using it because my hair was getting harder to style. Every haircut seemed to expose my thinning crown more. After using the cap consistently, I started noticing that I could style my hair without spending 10 minutes trying to position it perfectly over the thin area. That was a pretty clear sign of progress for me.
Christopher L.
male Pattern
I was skeptical. Very skeptical. My wife actually found Kiierr and kept sending me info about laser therapy. I kept saying I did not want another hair loss gimmick sitting in a drawer.
Eventually I started reading about how laser caps work and decided to give it a shot. My thinning was mostly through the crown and middle of my scalp.
The first thing I noticed was not dramatic growth. It was that my existing hair started looking better. It seemed stronger and had more body when I styled it. Later, when I compared my pictures, I could see that the thin area at my crown was not as obvious. I am glad my wife was persistent.
302 UltraFlex
Rachel M.
postpartum shedding
After having my 2nd baby, my hair shedding became intense. I knew postpartum shedding could happen, but seeing handfuls of hair come out was still upsetting. Once the major shedding slowed down, I wanted something I could add to my routine to support my hair as it came back. I chose the 312 DualWave because I wanted one of the stronger options and liked the idea of getting red light therapy at home. Using it became incredibly easy. I usually put it on while I answer emails or fold laundry. The biggest change for me has been around my temples. They used to look almost see through when I pulled my hair back. Now I have a lot of shorter hairs growing there and my ponytail is starting to feel thicker again. I know hair takes time, so I was not expecting something overnight. I am just really happy I stuck with it.
David K.
I bought it for my receding hairline. The front corners are not magically back to how they looked when I was 20, but the hair I still have looks thicker and healthier. That alone made it worth using for me.
Olivia B.
Temple Thinning
For me, this was about confidence. I had started avoiding certain hairstyles because my hair looked so sparse. The regrowth has been gradual, but those areas no longer look nearly as empty.
Daniel G.
My barber noticed before I did. I sat down for a haircut and he asked if I had started using something because he was seeing a lot of shorter growth around my sides. That was probably the moment I became convinced the cap was doing something.
Sarah V.
age related
My thinning started gradually in my 40s. At first I thought I was imagining it. Then I saw a picture taken from above and could clearly see my scalp. That picture bothered me enough to start researching. I came across Kiierr while looking into red light therapy and spent a lot of time comparing different options. I finally chose the 312 DualWave because if I was going to commit to using a cap consistently, I wanted to invest in one of the models I felt strongest about. I kept that original photo. Several months later, I took another photo in the exact same spot with the same lighting. That was when I could really appreciate the difference. The top of my hair looked darker because there was simply less scalp showing through. I still use it consistently because I see it as part of taking care of my hair now, just like skincare.
Heather N.
Widening Part
This cap is amazing!!! I had been using hair fibers almost every day to cover my part. After being consistent with the Kiierr cap for months, I slowly realized I was reaching for the fibers less and less.
302 Ultraflex
Ryan B.
Hairline Thinning
Easy to use, comfortable, and I can wear it while watching TV. My hairline looks denser than it did when I started. No complicated routine, which is exactly what I wanted.
Joseph N.
Genetic Thinning
Hair loss runs heavily in my family. I started noticing mine at 26 and decided I would rather be proactive. I chose the 312 DualWave because I wanted good coverage across the entire top of my scalp. My main goal was maintaining density, especially around my temples and crown. I have been using it consistently and my hair still looks strong. I have even noticed some areas that looked thin before seem denser now liek the temples/hairline. For me, starting early was the right decision.
312 Dualwave
Kevin J.
I waited way too long because I thought laser caps sounded strange. Now I use mine while I watch sports. My thinning area has definitely filled in more than I expected. I wish I had started when I first noticed my crown getting thin instead of waiting several years.
Steven H.
The top of my head was slowly starting to thin more and more. I knew I needed to do something before it got worse. I was really skeptical when I heard about laser therapy but I'm a believer now. It really works. My hair is so much thicker and healthier
272 PREMIER
Michelle D.
diffuse Thinning
I love my Kiierr cap! My concern was diffuse thinning all over the top of my scalp rather than 1 specific bald spot. After several months, my hair looks fuller overall. Even my ponytail feels a little more substantial. This is the best solution for hair thinning!
Jennifer A.
weight loss
I started losing density after a period of rapid weight loss. My hair eventually stopped shedding so heavily, but it felt like half of what I had before. The 272 DualWave gave me something simple I could stick with while waiting for my hair cycle to recover. Over time I started seeing new hairs throughout my part and around my hairline. I still have a ways to go, but my hair finally feels like it is moving in the right direction.
Ashley J.
Thinning
I have curly hair and was worried a laser cap would be annoying to use with my texture. It has actually been very simple. The area I cared most about was the front because my edges had become thinner over time. I am seeing new growth there and my curls around the front look much fuller.
Thomas F.
male pattern
At 34, I was not ready to just accept that my hair was disappearing. The 302 has been simple to use and I have seen the most improvement around the crown and the area just behind my hairline. I feel much better about my hair now than I did a year ago.
Samantha K.
I went through a really stressful year and my hair seemed to pay the price. I had shedding everywhere, not just 1 area. By the time I bought the Kiierr cap, the shedding had slowed down, but my density was still terrible. I wanted to give my scalp and follicles as much support as possible while my hair recovered. I liked that the 312 DualWave covered my entire scalp because my thinning was diffuse. The progress has not been overnight, but it has been steady. My part is narrower, I have new growth around my temples, and my hair does not look as flat when I wear it down.
Brittany W.
I bought this because my wedding was coming up and I hated how thin my hair looked around my temples. I started well in advance because I knew hair growth takes time. By the time we took our wedding photos, I felt so much better wearing my hair back. That confidence alone was huge for me.
Melissa C.
Menopause Thinning
Menopause did a number on my hair. I had always had thick hair, so watching it become finer was difficult. My stylist was actually the person who told me to look into laser caps. I researched several brands before choosing Kiierr. I wanted a cap with a lot of coverage and something I would realistically use. I have been very consistent with it and the difference has been gradual but real. My part looks tighter, I see less scalp around the top of my head, and my stylist even commented that she was seeing new growth. That comment meant a lot because I had not told her I was using anything new.
Mark D.
Age related
I am 51 and realistic about hair loss. I was not looking for a miracle. I wanted to see if I could improve the density of the hair that was still there. That is exactly what I feel like the Kiierr cap has done. My hair looks thicker, especially from the top and back. I also like that it does not interfere with my day.
Adam C.
I mainly wanted to maintain the hair I still had. Anything beyond that was a bonus. My hairline looks stronger and the thin spot behind it has improved. I am very satisfied.
Courtney L.
I used to obsess over overhead lighting. Restaurants, dressing rooms, office bathrooms, anywhere with bright lights made my part look so much wider. After months of using Kiierr, I caught myself standing under one of those lights recently and realized I was not thinking about my scalp at all. That sounds small, but it was a really big moment for me.
Matthew R.
Male Pattern
I researched laser caps for weeks before buying one. I compared the number of diodes, treatment process, company history, guarantees, and reviews. Kiierr kept coming back to the top of my list. My main issue was male pattern thinning across the entire top of my scalp. I still had plenty of hair, but under bright lighting you could clearly see where it was heading. I took baseline photos before starting and continued taking them monthly. The first few months were subtle. Around month 4, the difference became easier to see. The crown looked less transparent. After that, I started noticing improvement through the middle as well. What I like most is that using the cap requires almost no effort. I do not have to remember multiple steps every morning and night. I put it on, let it run, and move on with my day.
Jessica P.
My mom has very thin hair, and when I started seeing the same widening part in myself, I knew I wanted to address it early. I liked Kiierr because it was something I could do privately at home. I did not want regular office visits or a complicated routine. I started noticing baby hairs after a few months. Now the area along my part looks noticeably better in natural light, which used to be the lighting I hated most.
Eric M.
I was starting to get the classic thinning circle at the back of my head. It bothered me every time I saw a security camera screen or a picture taken from behind. The 302 has made that area look noticeably fuller. I still have some thinning, but the contrast between my hair and scalp is nowhere near as dramatic.
Emily T.
Fine Hair
I have fine blonde hair, so even a little thinning makes my scalp show. The cap has helped my hair look denser through the top, especially when I am outside in bright light. I feel much less self conscious about it now.
4.5 (2145 reviews)
312 dualwave