How to keep dog bone dry (electrical)

Hello everyone,

I am new to owning a motorhome and this may seem like a super simple question but interested in hearing what everyone does. When you need to use a dog bone, or maybe two, how do you keep them dry in the rain. These will hang down from the electrical box exposed to the elements.

I was thinking of wrapping them in saran wrap but is there a better way?

Thanks,

Stuart