272 DIODES
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302 DIODES
HAIR & SKIN
SKINCARE ESSENTIAL
PATENTED TECH
5 MODELS
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Stop Losing Your Hair.
Regrow It Naturally With the FDA-Cleared Laser Cap Trusted by 100,000+ People
Clinically proven, drug-free laser therapy that regrows your hair from home in just 7 mins a day. No side effects. No hormones. Just results.
7-Month Money Back Guarantee
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SHOP THE KIIERR LASER CAP
100K+ Happy Customers
"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, but I was astounded when I started seeing growth after 6 weeks! "
Denise C. ✓
100,000+
Lives Transformed
93%
Improvement in Hair Density
60 Days
Visible Reduction in Shedding
4.9/5
Customer Rating
Hey, We're Mike & Jolene!
Founders of Kiierr.
When our daughter was born, Jolene started experiencing severe postpartum hair loss. It led to:
Postpartum hair loss
Dangerous side effects
Thinning confidence
Expensive treatments
And more that I won't bore you with...
Watching her confidence fade was one of the hardest moments of my life. It wasn't just shedding — it was seeing my wife lose the spark that made her feel like herself.
I knew I had to find something safe for her as a new mom. Something that wouldn't mess with hormones or introduce chemicals into her body.
Then... everything changed when I discovered Low-Level Laser Therapy.
That search is what became the beginning of the Kiierr story.
I Tried Everything From:
Minoxidil (Rogaine)
Finasteride pills
Laser combs
Essential oils
Biotin supplements
Scalp serums
Thickening shampoos
Hair vitamins
And don't get me wrong...
Some of those things help a little, and people still use them. But they weren't the game changer our family was looking for. I wanted to find something that actually worked — while also being safe enough for a breastfeeding mother and not costing us thousands of dollars. I know that's asking a lot. But I just knew it had to be out there.
I went on a mission to find what actually regrows hair without:
Prescription drugs with scary side effects
Messy topicals you have to apply twice a day, forever
Spending $10,000+ on painful surgery
Here's Why I Fell In Love With Red Light Therapy
Stimulates blood flow to follicles
100% drug-free & hormone-free
Reactivates dormant hair follicles
Clinically proven in peer-reviewed studies
FDA-cleared medical device
🔬
Medical- Grade Laser Diodes
💡
650nm Wavelength
🧠
Deep Follicle Penetration
⚡
Cellular Energy Boost (ATP)
🩸
Increased Blood Flow
🌱
Natural Hair Regrowth
Here's The Science That Changed Everything...
When I first discovered Low-Level Laser Therapy, I was skeptical. Another "miracle" solution? I’d heard it all before.But then I started reading the clinical studies. Page after page, study after study — all pointing to the same truth: medical-grade laser diodes could stimulate real, natural hair regrowth.Not LEDs. Not serums. Not pills. Actual laser diodes delivering the precise 650nm wavelength proven to penetrate deep into hair follicles and wake them back up.Safe for breastfeeding mothers. Safe for anyone who didn't want to gamble with their health. That's the moment Kiierr was born.
Here’s the problem
The red light therapy devices that actually worked were massive, bulky machines locked inside clinics and dermatologist offices.You'd have to book appointments, sit under a giant helmet, and pay hundreds of dollars per session.Not exactly practical for a busy mom — or anyone with a real life.I knew the science was right. But the delivery was all wrong. It needed to be portable, affordable, and something you could actually use at home without feeling like a science experiment.
The Laser Cap That Gives You Clinical-Grade Hair Regrowth At Home.
So I teamed up with engineers, dermatologists, and laser specialists to take everything that made red light therapy work — and put it inside a cap you can wear anywhere.
We didn't just copy what was already out there. We added more medical-grade laser diodes than any other cap on the market, dialed in the exact 650nm wavelength proven in studies, and made it look like a normal hat.
That's when the Kiierr movement was born (which is now a community of 100,000+ people who've taken back their hair and their confidence).
Portable. Discreet. Affordable. And backed by real science — not marketing hype.
100,000+ lives changed.
Here's why 100,000+ people trust Kiierr for their hair regrowth journey
*Individual results may vary. Based on clinical studies and customer feedback.
Nothing worked until Kiierr!
After spending 10 years trying other hair growth products, I heard about the success of laser therapy after researching. I could see remarkable results after only 6 months.
James R.
Verified Buyer
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. The cap has helped significantly in promoting new hair growth.
Jenna P.
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 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.
Marsha W.
I saw lots of new growth!
Since using the Kiierr laser cap, I have definitely noticed a difference in my hair. After a few months of using it.
Denise C.
It helped me stay consistent.
I started seeing new hair after about five weeks. I was skeptical, but the ongoing encouragement.
Austin W.
I would Recommend!
I have been using the Kiierr Laser cap for 6 months. It works great.
Lisa G.
See All Transformations
SHOP THE CAP
Due to high demand and limited inventory, April has a very high risk of selling out❗
How Red Light Therapy Revives Hair Growth
Using medical-grade laser technology, Kiierr stimulates blood flow, reactivates dormant follicles, and strengthens hair for long-term regrowth.
1
Laser therapy stimulates blood flow to the scalp
Restore Blood Flow
Delivering oxygen and nutrients directly to hair follicles, reawakening them from dormancy.
2
The medical-grade lasers kickstart the growth
Reactivate Dormant Follicles
Cycle in inactive follicles, helping hair grow thicker, fuller, and healthier.
3
Consistent use strengthens hair over time
Strengthen & Thicken
Ensuring long-term results without invasive treatments or harsh chemicals.
start your regrowth
What To Expect With Consistent Use
Real results take time. Here's a realistic timeline based on clinical data and feedback from 100,000+ Kiierr users.
2 Months
This is where it gets exciting. Fine baby hairs may start appearing in thinning areas. Hair starts to feel thicker to the touch.
Marsha W. said: "After 5–6 weeks, new hair began growing on my bald spots."
6 Months
✨
Significant hair regrowth is visible. Temples, crown, and hairline are filling in with thicker, stronger strands.
Frank L. reported: "My temples and the thinning hair on my crown have filled in." This is when most say "I can't believe this actually worked."
Week 1
🧢
Starting your routine is simple — just 30 minutes, every other day. The medical-grade lasers begin stimulating blood flow to your scalp, delivering oxygen and nutrients to starved follicles. No visible changes yet, but the healing process has begun.Week 1
1 Month
🫀
Many users report less hair in the shower drain and on their pillow. Your scalp may feel healthier and less irritated. The increased circulation is strengthening existing hair and preparing dormant follicles to reactivate.
3 Months
💪
Visible improvement in hair density and thickness. Thinning areas are filling in. Friends, family, and even your hair stylist may start noticing.
Karen N. shared: "Even my friends & hair stylist noticed the improvement!"
12 Months & Beyond
👑
Long-term users see the best, most sustained results. Hair continues to strengthen, thicken, and grow.
Vincent R. said: "My hair strands have become thicker & have less shedding." Consistency is your superpower.
Used by thousands of doctors worldwide
Clinic-grade technology, now accessible to you
Sold in clinics since 2018 and trusted by thousands of medical professionals — now available at a price that makes sense for everyday use.
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.
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.
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.
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.
Why Our Technology Outperforms
Medical-grade lasers. Not cheap LEDs.
Most caps on the market rely on LEDs that don't penetrate deep enough. Kiierr uses real laser diodes — the same technology used in clinical settings — to deliver the precise wavelength needed to restore dormant follicles.
10×
Deeper Follicle Activation
90%
Saw Fuller, Thicker Hair
4×
Improved Laser Absorption
Reduced Shedding
Proven Results, Trusted by Thousands
Want to be the next Kiierr success story?
Chosen by 100,000+ men and women to regrow hair and restore confidence!
30 minute treatments
Medical-grade lasers
FDA cleared & safe
One-time-purchase
7-Month Money-Back Guarantee
We built Kiierr for our own family — so we stand behind it completely. Try the laser cap risk-free for 7 full months. If you don't see the results you want, we'll refund your purchase. No questions asked.
Zero risk. Full confidence. Real results.
Common Questions About Kiierr
Will laser therapy work for my type of hair loss?
Absolutely! The great thing about Low-Level Light Therapy (LLLT) is its versatility! Whether you are male or female, 18 or 88, from pattern baldness to hair thinning due to stress or medical conditions like including alopecia areata, hormonal imbalances, telogen effluvium and so much more.
Users of all hair textures and skin tones have seen incredible results, regardless of age. Start your journey to thicker, healthier hair today and see why so many trust Kiierr for their hair growth needs!
Which laser cap should I choose?
We have 4 laser cap options: 148 Pro, 272 Premier, 272 MD Elite, and 302 MD Ultra Flex. Choosing the right cap depends on your specific needs. For early stages of hair loss or those on a budget who are okay with slower, steadier results, the 148 Pro is ideal. If you’re seeking more significant and quicker regrowth, the 272 Premier is our bestseller.
For larger head sizes or extensive coverage, the 272 MD Elite is perfect. Lastly, the 302 MD Ultra Flex offers the fastest results and superior comfort. Ideal for severe hair loss, this model also offers a soft flex fit for maximum comfort.
How long will it take to see results?
Results vary, but most users see noticeable improvements within 6-12 weeks. We’re so confident in our product that we offer a 7-month growth guarantee—if you don’t see results, you can return the cap!
Why should I buy your cap vs competitors?
Choosing Kiierr is like joining a family & community committed to hair recovery. Since 2017, we’ve provided top-quality, medical-grade laser caps with a solid 2-year warranty. With our 7-month growth guarantee, you can trust that we’re as invested in your hair journey as you are.
Our exceptional customer service is always ready to support your journey; real people who genuinely care, ready to guide, support, and celebrate your progress with you.
Do you offer payment plans?
Yes! We offer flexible payment options through Affirm, Afterpay, and PayPal Pay Later, providing easy monthly installments or delayed full payments to suit your financial situation.
Affirm allows you to split your purchase into easy monthly payments with interest rates as low as 0% APR. See terms and conditions here.
Afterpay allows you to split your purchase into four equal installments, due every two weeks, no interest or fees. PayPal Pay Later, you can choose to pay in full within 6 months with no interest, or make minimum monthly payments with interest.
Just pick what works for you at checkout!
Is laser therapy safe to use?
Laser therapy is a safe, non-invasive, and natural way to treat hair loss before considering more drastic measures like medications or surgery.