Durable and very effective
Whereas other far infrared heating pads use stones that emit far infrared when warmed, these use a patented rectangular shaped device that emits only on one side...the one against you. Only one control - an on/off switch - and no temperature options. I found the temperature ideal, not too cool and not too hot, and way better than regular electric heat pads I’ve used for years. Everything but the velour cover is made in Canada and by both appearance and online testimonials can be expected to last a very long time.