USB Heating Pad 1 Pair Black USB Carbon Fiber Heating Mat 5V USB Electric Heating Film Heater Pads USB Heating Film Heat Pad for Warming Feet 35-50 ℃

I have a set of these USB Carbon Fiber Heating pads that I put under my jacket and sweater when riding my ebike. I pair them up with a regular portable power bank. They are nice and warm when I ride. I thought I would have to buy something that would cost much more to get the value that these offer at such a lower cost. They are so easy to use. they are strong being made from Carbon Fiber. A great value product.

This product doesn't get warm at all. Need to send back

I'm a deer hunter with chronic cold feet. I've tried silk liners with warm socks, changing boots in the stand, keeping my boots laced loosely, using those chemical packs for feet, I've even tried heated insoles.None of that worked, heated insoles a little. These babies you can slip into your socks with some adhesive Velcro, they get so hot I thought my feet might burn. I power these plus a heated shirt I made with 20-24k mah USB power bank. I use two power banks so I can rotate them between sits to charge.Downside of these guys? There is absolutely no retention from the main USB cable to the cable that goes to the sheet. So I duct taped them together. This morning one slipped out on my left foot, miserable morning.So I just duct taped it better.Anyway, if they would fix this, these things would be 6 stars.

Works as it should doesn’t last long with a battery pack, but I guess you can always get bigger battery packs

Works, but delicate

I really enjoyed this until the cord broke on one side. Used it for a month. There isn't a way to control the temperature but I would unplug it when it got to hot. It also drains batteries like mad, but I was expecting that. I used kobalt 4ah with a USB adapter and it would last about 6 hrs of continues use. I feel that with a bit of working this could easily be a 5 star device. Even still I might buy it again next winter.

I put them in a hand muff warmer. Worked great.

These appear to be made by a first grader in science class. A piece of light cloth folded and glued. Terrible quality. Not carbon fiber as described. Made in China garbage.