Simply a shoe hanger for wet (or dry) shoes you don't want cluttering up the floor. I use these for drying my shoes (it's pretty snowy here in Denmark at the moment).
If you want to use these as a space saver in a closet, I included a hole to enable them to be stringed together (use thicker wood, they might get heavy with 5 or 6 pairs of boots adding up weight)...
You will have to adjust the size of the "horns" to accomodate smaller shoe sizes (these fit European ~size 38 or US size 6 & up).
Note that if you want to hang more than two pair of wet shoes together, you also might want to adjust the width of the top hangers, to keep water from one pair from dripping on the ones below).