They are extremely thin and flexable, and are really warm to a low hot when they are on setting (no 1) Red Glow.
They last about 3 to 4 hours on red glow.
They are also great for using on my phone with the touch fingertips while driving, My phone is sitting on a shelf open, when it rings, I can answer with just a small touch on the answer button. I can then talk really freely because my phone is connected to my hearing aids and then I am hands free.
A really great buy, Thank...