Review on USB Heated Gloves Mitten for Winter - Unisex Hand Warmers for Women & Men - Full & Half Heated Fingerless Laptop Gloves - Knitted Hands Warmer with Washable Design (Black) by Justin Malkowski

Heating pads are not made of materials that should be flexible. The pads have copper strips at each end that will crack over time when flexed. To make matters worse, the connection wires are soldered in the middle of these copper strips. The solder doesn't bend, so there's a spot next to the solder that bends with every movement of your hand. In less than 10 days of use, both of my gloves failed this way. If they worked, they were ineffective. I usually have the coldest fingers when I'm at work. These gloves have heating pads located at the base of the palm near the wrist. My fingers stayed cold. On the plus side, knitted gloves seem to be good in their own right.