My parents have several elderly barn cats. I'd like to make them a…

My parents have several elderly barn cats. I'd like to make them a heated nook to sleep in. This is lowest price waterproof heating pad I could find. Anyone have any opinions on this or other water/claw resistant heating pads?

https://www.amazon.com/RIOGOO-Heating-Upgraded-Electric-Waterproof/dp/B07XHPRHGJ/ref=psdc_3024178011_t2_B082KPNQF1