Powered by patented Climacon technology, the KÜLKUF wristband allows you to take control of your core temperature. Stop hot flashes within seconds with the push of a button.
Kulkuf (kulkuf.com) has 28 customer reviews on Five Star Index, with an average rating of 4.3 out of 5.
Also known as
kulkuf.com
Website
kulkuf.com
Category
Salons & Clinics
Location
California, California
Listed on Five Star Index
2026
About these reviews
Replies
The company replied to 29% of reviews.
Latest
Most recent review: August 2025.
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I notice that the good reviews are several years old.
I purchased a Kulkuf unit 2 moonths ago for my wife, but she found it too bulky. I tried contacting the company well within a month to arrange a return, and have heard nothing from them after 4 attempts to contact them. As best I can tell, there is NO customer service! (I gave them 1 star only because "none" was not an option.
I recommend trying to contact them yourself prior to purchasing their product. Otherwisee, only buy if you're certain you want this, because there's apparently no going back. Very frustrating!!! Caveat emptor!
LK
Lisa K.
Customer service has been amazing!!
Customer service has been amazing!!! The cuff definitely gets cold. Unfortunately, it did not lessen the severity of my hot flashes. It is also quite large on my tiny 100-pound frame. I think it is certainly worth a try if you suffer from hot flashes…it just may work for you.
JI
Jill
Do not recommend
Update: September 2023. The fan in my Kulkuf stopped working in August after owning it for less than a year and only using it intermittently. I contacted the company and they sent a replacement after a few weeks, but it was the wrong size. I have asked them twice to send the correct size and they have stopped responding. So I have no working device and I consider it a waste of money since it lasted less than a year. I'm unable to recommend the Kulkuf based on my experience. There are competitors on the market now so I may try one of those.
Original review: I have been using the Kulkuf for a few weeks now and the experience has been mostly positive. Shipping is from India and took less than a week to reach me in the U.S. The first unit I received stopped working properly shortly after I began using it. I was able to have a replacement shipped quickly, which I really appreciate; however, I had to pay the cost of shipping the faulty item, which is unheard of in my experience. The manufacturer should absolutely cover the cost of returning a defective unit (the post office even commented on this!), and for this reason, I have taken off one star in my review.
As to the cooling properties, I find that the wristband does help some with cooling. I had expected to be able to wear it to bed; however, because it cannot be operated under the covers, I am reluctant to fall asleep with it on and accidentally activate it under the covers during the night if I wake up and turn it on half-asleep. For this reason, I keep it on my nightstand but would have to wake up enough to reach for it, put it on, turn it on, and then take it back off once done. This is the reason for reducing my review by a second star.
I only wear the wristband at home (I work at home). I would probably wear it other places if it were more streamlined, but the current version is bulky, as other reviewers have noted. I don't use it during workouts as I wouldn't want it to get sweaty (plus, you're supposed to get hot during a workout). I use it for times when I don't necessarily expect to get hot.
I wish it had a battery indicator, but that would require some type of display. I just have to remember to charge it every couple of days. It comes with a small travel bag which is nice.
Response from KulkufSep 16, 2022
Hi Jill. Thank you for your feedback. As we are in India now we are not able to process the reverse shipping and we are sorry for that discomfort. In next couple of months we will be having operations in the US and all this process will be much more seam less. On the product side we are launching our next version addressing design, size and working on a low battery indicator. One the new design is done we will send you a replacement.
JL
JLK
The bottom line
The bottom line - this works for me. I've been having serious hot flashes all day long, and it makes my job as a teacher rather miserable! Yes, the cuff is bulky, but the benefits for me outweigh the problem. I did contact Kulkuf to tell them that the cuff did get very hot one night, but haven't heard back from the company. I also think the velcro could be more secure. I have had it fall off a few times, and I don't want it to break hitting the ground!
Am I glad I bought it? Yes. Could it continue to be improved? Yes.
Response from KulkufSep 15, 2022
Dear JLK. Thank you for your kind words and glad that we took care of your hot flashes. Please write to us @ [email protected]. We are working on a new design which will be much smaller and will not use any velcro. It will be ready by 15th Jan and we will send you the replacement with the new design.
EA
Elizabeth A.
don't waste your time or money
Product is bulky and heavy to wear - which I could deal with if it worked - battery did not last very long - trying to return it has so far been a nightmare - no response to emails - the phone number listed on the website is busy all the time - I have yet to figure out how I will be able to get my money back. Do not recommend!
Response from KulkufAug 17, 2022
Hi Elizabeth, We are sorry that the product did not work for you. We have replied to your mail about the return process. Typically it takes for us 24 hours to respond. We have refunded your order.
SR
Suzi R.
Amazing.works great
Amazing.works great. I am in winter so I'll see how it goes in summer but so far all good.
Response from KulkufJun 17, 2022
Dear Suzi. Thank you for your review. We are glad it's working for you. Whether its summer or winter the device cools to the same temperature.
SU
Sunrise
Stops hot flashes within Seconds
The Kulkuf stops my hot flashes within seconds. It is wonderful to have when in tight spaces with others and at night to keep sleeping. When sleeping you have to remember not to block the cooling mechanism else it will get very hot. Very easy and intuitive to use right out of the box.
-The material is rough and not washable so it is not suitable for exercising.
-It is too bulky for typing, but you can keep it close by to use.
-I would recommend a design without hook & loop closure because it will eventually wear out.
-I would be happy to be a Tester for any design changes.
Response from KulkufJun 17, 2022
Dear Sunrise. Thank you for your review. We are glad that KULKUF works for you.
We would take your offer we are testing some new designs. We will get in touch with you. Can you please email us your details to [email protected]
EP
EPG
It worked, but too bulky…
I liked the concept of the bracelet, but it was much too bulky for me. It turned cold quickly but almost to the point of being painful (for a brief second) but after that, it cooled me down. Unfortunately, I returned if because of the bulkiness….waiting for my refund now.
Received my refund quickly. Great customer service, I wish the bracelet was more to my liking, but the return process was easy.
Response from KulkufJun 17, 2022
Dear EPG. Thank you for your review. We are developing some new designs which are not bulky and will keep you updated with the new designs.