I bought these in hopes of being able to strap them on some boots and walk around in the fallen snow in order to freak out the neighbors. They fit on the boots just fine, but they are too soft for making an impression in the snow. The toes have foam in them for support, but not enough to make a detailed impression in the snow. However, they seem awesome as part of an ape costume, and they fit over snow boots so I could only imagine that you could count on these to fit over anything. I found that the trick to getting them on the shoe is to start them from the back where the elastic is and then pull them onto the front.