Why it's worth it
The ThermaNAP has no electronics at all. A reflective thermal layer under quilted faux fur bounces your pet's own body heat back at them, so it warms only where they're lying, and the whole 36-by-24-inch mat goes straight into the washing machine.
Let's be honest about what this does. It doesn't make heat. Furhaven's thermal core reflects warmth your pet already produces, so the mat is cool when they lie down and warm a few minutes later. That's a smaller effect than a plug-in pad, and anyone expecting a hot surface will be let down. But for a cat who just wants the couch to stop stealing their heat, it's enough.
For chewers, puppies, and anywhere near water, cordless wins outright. No cord means no fraying, no shock risk, and nothing to unplug when you leave the house. The AKC's advice about inspecting heated bed cords for damage simply doesn't apply here. If you have a teething puppy or a cat who attacks wires, this is the one style in this guide you can leave out unsupervised.
From our review of 6 heated pet beds