Wasteland Champion Tire Armor by swanboy. I imagine a tire would actually absorb a lot of force from blunt instruments. (It also blocks a lot of cutting weapons, it just needs a bit of padding underneath it)
Concept from Korean designer Sungho Lee: Intuitively, I love it! How clever! I want to make a bunch of my own—as I imagine Mr. Lee did—by cutting up some paper clips, clipping the leads on a bunch of LEDs, and soldering the one to the other.