[cryptonector]

Fields aren't made of anything. When you feel static electricity, like when you rub a balloon against your hair, and your hair then stands up, that electric charge on the balloon and your hair is somehow being made evident across the space between the hair and the balloon. That communication of force electric charge happens over the electric (really, electromagnetic) field. It happens across air and vacuum alike. Nothing need be between the charged objects and yet the charge will be "felt" by them. That "field" is just the numeric electric charge felt at each point in space, for all points in space. It's just field strength -- a bunch of scalar values, one for every point in in space. We call that a field, but it's not an object made of stuff, just a mathematical object.