These are the boot covers worn by Royal Pain in Sky High.

This file package includes a total of 10 STL files:Left and right side boot coversLeft and right shin covers, which are each broken into 3 pieces: top, middle, and bottomLeft and right shin covers, each as a single file

When I name my files, I am referring to left and right according to my perspective as the wearer, ie: I will put the right boot cover on my right leg.