K&H Pet Products Extreme Weather Outdoor Kitty Pad, Heated, For Indoor and Outdoor Use Black Small 12.5 X 18.5 Inches 40W

Is this safe to lay in straw bedding? I have an outdoor feral cat house with straw inside.

can I put this pad on top of my kitty’s current soft fluffy bed?

can this be placed under a cat bed or does it need to be on top of the fleece bed?

Is this bed bendable because it looks pretty solid and its slighlty to big for my feral cat house? please let me know, thank you?