What do you wrap your foot in after an injury?

Coban or coflex are good products. They are Latex free and won't stick to your skin. They are sold at most drug stores.

Depends on the details. The foot is anything below the ankle. A foot injury can be any of a variety of injuries. Stepping on a sharp seashell can lead to a cut foot or punctured foot. Many sports injuries on the soccer field lead to foot sprains or even to fractures, but don't tend to break the skin. Treat depends on the type of injury. Wrapping can be with gauze, elastic bandage, tape, etc.