Afghanistan's version of electric blankets

We use these heavy blankets at night. Really heavy. Each weighs about 10 pounds. You’d think they would keep you warm, but it is made of some synthetic fiber I have never felt before. Kind of like felt, but heavy. They also have an added feature: they spark. Seriously. If your skin is a little dry (and every one’s skin is dry here), the friction of your hands against the blanket makes it spark. I almost want to bring one back with me to show off, but I think it will put me over the edge on my weight allowance!