Hair loss commonly affects both men and women, leading to the development of devices, medicines, and surgical procedures to reverse or slow hair loss. One such technology is low-level light therapy, which is proposed to work by stimulating hair growth. The Kiierr Laser Cap harnesses the power of low-level light therapy in an easy-to-wear baseball cap.
The Kiierr cap provides an at-home option for an intriguing and easy hair loss treatment that avoids the high price and risks of hair transplant surgery. Therefore, we have provided this honest review to help consumers understand the use of light therapy in hair loss and what this product offers.
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What is the Kiierr Laser Cap?
The Kiier Cap is an FDA-cleared device utilizing low-level light therapy to stimulate hair growth and improve conditions such as androgenic alopecia (male/female pattern baldness). Light therapy may be effective in other conditions such as alopecia areata, telogen effluvium, and chemotherapy-induced hair loss.
This device uses laser light produced by laser diodes embedded in a baseball cap to stimulate hair follicles and support hair growth. This easy-to-use device provides an at-home option for light treatment for hair loss. Each diode produces a 650 nm wavelength of red light, which is the scientifically and clinically established wavelength for effective hair loss treatments.
Support your hair health with the Kiierr Laser Cap, a clinically proven and safe method to promote hair growth.
Kiierr Laser Cap: A quick review
Kiierr manufactures three versions of laser caps to provide options for customers, depending on their needs and budgets. The laser caps available differ by the number of laser diodes present within the baseball cap (148, 272, and 302) and the power output of the device (740, 1,360, and 1,510 mW).
These laser caps use medical-grade diodes to stimulate dormant hair follicles, providing FDA-cleared hair loss treatment. This dermatologist-recommended cap fits head sizes up to 32.5 inches and can be used comfortably in your home with daily or every other day treatment regimens.
This portable device is advertised to promote healthier, thicker hair follicles to treat hair loss and provides a 7-month growth guarantee.
How and why we chose to review this product
The Kiierr hair growth device was selected for review due to the availability of three different laser caps to match the needs and budgets of its customers. This provides customers the ability to choose from three high-quality caps that utilize medical-grade diodes to provide light to stimulate hair growth.
In addition, we chose the product based on criteria such as FDA clearance and reviews from verified customers. This ensures the Kiierr company uses rigorous manufacturing standards to produce devices that meet the highest quality standards. The reviews help to identify products that real users have experienced improvements in their hair growth.
Kiierr Laser Cap Components and Usage
The Kiierr 272 Premier, 148 Pro, and 302 MD Ultra Flex caps are plain black baseball-style caps that can be worn anywhere. Each hat can fit heads up to 23.5 inches in circumference and has a stretch-fit headband to secure it in place.
The device comes with a wall charger power plug, a USB cord, and a portable power pack. A user manual and FAQ guide come with each product to help with any questions regarding the use of the product.
The recommended session times depend on which product you purchase with the 148 Pro cap and 272 Premier laser cap recommending 30 minutes every other day. The 302 MD Ultra Flex cap recommends a six-minute daily light treatment regimen.
The use of this product does not require any technical knowledge, just place the cap on your head, turn it on, and enjoy your day. The cap will automatically shut off when the treatment session is complete.
Unboxing experience
The unboxing process was smooth and user-friendly. The product box was impressively sturdy and conveniently foldable, making storage a breeze.
Inside, the contents were neatly organized, clearly labeled, and individually packaged. The cap and laser device were in a practical, unzippable soft-shell case, perfect for easy portability. Additionally, the box contained a sleeping mask, a separate charger, and a cable, each thoughtfully wrapped.
The portable charging pack was securely stored in its durable carrying case, which can be easily clipped to a waistband. It also fits perfectly in a pocket, adding to its on-the-go convenience. The instructions were clear and straightforward, making the setup process hassle-free.
The whole process made it easy to start using the product without any issues.
Kiierr Laser Cap effectiveness and safety
This dermatologist-recommended, FDA-cleared device provides treatment of hair loss conditions such as androgenic alopecia. Each device is rigorously manufactured to meet the highest industry standards.
The use of light (within the 650 nm wavelength) has been shown to be an effective treatment of hair loss. Studies have shown this wavelength of light stimulates a dormant hair follicle to restart growth, leading to improved hair density and caliber.
Consider that no red light therapy product can produce immediate results. Many of these devices require three to seven months to see effects. Fortunately, the Kiiers 302 MD Ultra Flex model has been shown to produce the earliest noticeable results.
User experience and performance
| Brand's website | Amazon | Trustpilot |
| 4.8 out of 5 stars ⭐ | 3.8 out of 5 stars ⭐ | 3.7 out of 5 stars ⭐ |
What people liked
Customers are impressed with the high-quality product and ease of use of the caps. People have highlighted the comfort and convenience of this product and stated the instructions provided are clear and adequate for use.
What people didn't like
Some consumers were not happy with the results of the caps in treating their hair loss; however, it is important to remember individual results can vary depending on the reason of the hair loss. The size of the cap is also a concern for many and has been noted to only fit smaller heads.
Expert opinion
An Idaho dermatology physician assistant, Amy McKinlay, has endorsed this product based on her patient and individual results. She has stated that the product was effective for her and her son in improving their hair thinning and producing noticeable results. She currently recommends it to many of her customers suffering from androgenetic alopecia.
Tips and tricks for best results
To ensure effiecient therapy these tips should be followed:
- Purchase a high-quality, low-level light therapy device. Low-level light from diodes rather than LEDs may improve the results.
- Consistent use. Follow the recommended treatment regimen and work sessions into your daily routine to improve consistent use.
- Talk with your doctor or dermatologist. Using additional pharmacologic products, such as minoxidil, an FDA-approved product for hair loss combined with laser caps, may provide additional help treating receding hairlines and thinning hair.
Common mistakes to avoid
Avoiding these common mistakes will ensure the best results.
- Quitting therapy too soon. It is important to remember that results may not be visible for the first three months of use.
- Using it for wrong hair loss conditions. The most common and effective condition treated with laser caps is androgenic alopecia, while for others the evidence of low-level light therapy is still inconclusive.
- Using it more than its recommended. Sticking to the recommended treatment regimens can maximize results and minimize adverse effects such as skin damage.
How much does Kiierr Laser Cap cost and where to buy it?
The Kiierr Laser Cap Hair Growth System is available for purchase on the Kiierr website.
The cost depends on the number of diodes in the device.
| Model | Price |
| Kiierr 148 Pro Cap | $749 |
| Kiierr 272 Premier Cap | $899 |
| Kiierr 302 MD Ultra Flex Cap | $1,699 |
Each purchase comes with free 2-day shipping within the United States and comes with a 7-month hair growth guarantee.
Comparison with other products
| Brand | Price | Number of diodes | Duration of session | Recommended frequency | LED vs. Laser diodes |
| Kiierr | $749–1,699 | 148–302 | 6–30 minutes | Daily or every other day | Laser |
| iRestore Elite | $1,899 | 300 (laser) and 200 (LED) | 12 minutes | Daily | LED and laser |
| iRestore Professional | $899 | 82 (laser) and 200 (LED) | 25 minutes | Every other day | LED and laser |
| Capillus Pro | $1,359.20 | 272 | 6 minutes | Daily | Laser |
| Illumiflow | $699 | 272 | 30 minutes | Every other day | Laser |
| Hairmax | $1,499 | 272 | 7 minutes | Daily | Laser |
For more in-depth comparisons see our best laser hair growth devices article.
Final verdict: Kiierr Laser Cap
Our overall opinion on the Kiierr devices is that they provide significant value to the arsenal against hair loss. The high-quality craftsmanship and easy-to-use style at a price comparable to other top products give these caps an overall high value-to-cost ratio.
The strengths of this product include the variety of laser diode counts from 148–302 and the fact that all laser diodes are medical-grade, capable of producing light within the 650 nm wavelength, a wavelength shown to be effective in stimulating hair growth. The manufacturer also provides a 7-month guarantee that you will be satisfied with the results.
The weaknesses of this product include the fixed size, and for some customers, it might be too small for effective use. Additionally, there is a 25% restocking fee when returning the product; it is not entirely a risk-free investment. Finally, the 30-minute treatment sessions for the 148 and 272 model devices may be longer than some prefer.
FAQ
Do laser caps really work for hair growth?
Yes. While results may vary between individuals, studies have found low-level light therapy to be effective in increasing the caliber and density of hair in androgenic alopecia. These devices have been shown to provide results over three to seven months of consistent use.
How many laser caps does the Kiierr offer?
Kiierr offers three different caps for hair loss treatment. Each cap differs in the number of laser diodes, with the highest diode cap having a shorter duration of treatment. The entry-level cap has 148 diodes and should be used 30 minutes every other day. The mid-level cap has 272 diodes with a similar treatment regimen. The high-end version has 302 diodes and should be used for six minutes daily.
What is the difference between Kiierr and Capillus?
The main differences between the Capillus and Kiierr 272 premier caps are the treatment durations, frequency of use, and price. The Kiierr device recommends a 30-minute treatment session every other day compared to 6 minutes daily for the Capillus. However, the Kiierr device is cheaper ($899 vs $1,359.20).
Is it OK to use a laser cap every day?
The manufacturer's recommendations should be followed for each cap. Some devices recommend therapy sessions, while others request using the cap every other day. Sticking to these recommendations will prevent unnecessary damage to the skin while still maintaining effectiveness.
3 resources
- Annals of Dermatology. Hair Growth Promoting Effects of 650 nm Red Light Stimulation on Human Hair Follicles and Study of Its Mechanisms via RNA Sequencing Transcriptome Analys.
- Journal of Clinical and Aesthetic Dermatology. A Systematic Review and Meta-analysis of Randomized Controlled Trials of United States Food and Drug Administration-Approved, Home-use, Low-Level Light/Laser Therapy Devices for Pattern Hair Loss: Device Design and Technology.
- American Journal of Clinical Dermatology. Efficacy and Safety of a Low-level Laser Device in the Treatment of Male and Female Pattern Hair Loss: A Multicenter, Randomized, Sham Device-controlled, Double-blind Study.
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