It looks as if someone had removed the bones out of these zombies legs and feet? A pair of zombie feet boots that go up to the users upper calves (have up to 3 advantage rolls per long rest against any zombie). As a free action you can lift your toes up causeing the zombie feet boots to wiggle its toes. 

The breastplate and shoulder protectors of this armor are made of leather that has been stiffened by being boiled in oil. The rest of the armor is made of softer and more flexible materials.

Notes: Advantage: Ability Checks, Need to wear for one hour in a circle of Zombies (dead or alive), Buff, Utility, Footwear, enchantment