I keep my home pretty chilly in the winter (I have a fireplace in the basement where I spend most of my time so I keep the thermostat at 63°) so I needed a heating pad to keep it in the optimal range. I got this mat from amazon because it had a built in thermostat. Pretty decently priced, too. https://www.amazon.com/gp/product/B01IDQDCNY/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1