Prototyping serves to provide specifications for a real, working system rather than a theoretical one. In some workflow models, creating a prototype (a process sometimes called materialization) is the step between the formalization and the evaluation of an idea. A User Experience Prototype captures enough aspects of the intended design that it can support user research. 2  A Visual Prototype captures the size and appearance, but not the functionality, of the intended design.
In the mid-1930s, the last main improvement to the leather football helmet was introduced: The facemask. Vern McMillan, who owned a sporting goods store in Terre Haute, Indiana, was credited with inventing the first facemask design.
Once you have gathered all of these items it is time to start learning how to clean a football helmet. 1  Brush off large dirt and mud clumps. For all the large obvious clumps of stuff on your football helmet you can simply use your hands to knock them off. 2  Use a dry cloth to wipe down the helmet.