They really work!
I bought these as my feet are often cold. I am a professional athlete and have a very low blood pressure and a resting heart rate of below 40. So when I need to sit still in front of the computer, cold feet are almost inevitable. In addition, for health reasons I keep the temperature in my house below 70 F. I was looking for a solution to cold feet for some time, and  best I found so far were woolen socks and a yoga mat under my table.<br />I was quite skeptical when I got these slippers, but from the first moment they were really convincing. First off, the slippers themselves are well made. The material they are made of is sturdy and yet soft and comfortable. On the inside, the fabric is even softer, slightly padded. They have an adjustable opening that doesn’t open too far (I am a size 12) so that you have to slip in first until your toes touch the front, then pull up the part that covers your heels. Once done, they fit nicely and sit snugly on your feet.<br />The energy for the heating comes from two standard charging batteries, as you would also get to charge your phone on the go. They come with a dual USB-C cable so that you can charge both batteries using only one USB outlet. The charging time is about 1 h. Then you have to connect the batteries via a cable and put them in a small pocket for each slipper that sits on top. of it.  They are rather easy to insert in the pocket. I was surprised how comfortable the slippers were even after inserting the batteries; they just add a light weight on top of your foot, which you very soon forget about.<br />The slippers have a button on the outside that you push to switch them on. They have three settings indicated by three different colors. I kept them on the highest level and had them on for  an hour a day. The batteries lasted for three days. That is good enough for me as already after ten minutes my feet began to be nice and warm. The good thing is, when you are physically fit as I am, it’s enough to get your feet  warm. Once they are warmed up, and the arteries are widened, they manage to stay warm without any additional help.<br />If you suffer from cold feet, I can recommend these slippers. They are well made, they work, the batteries are ok, and they absolutely do the job they promised to do.
Rating: 5 stars