 Captain America's shield, which serves as both a defensive tool and a weapon, came in four types: metal, fiberglass, rubber, and computer graphics (CG). Prop master Barry Gibbs specified that "We had the' hero shield, 'which was made of aluminum, for our beauty shots [and] close-up work. We then created a lighter shield that was aluminum-faced with a fiberglass back, for use on a daily basis. ... And then we had a stunt shield made of polyurethane, which is sort of a synthetic rubber ... and we made an ultrasoft one we put on [Evans'] back, so that if there were an accident, it wouldn 't hurt him." Visual effects supervisor Christopher Townsend said Evans "would practice swinging the practical shield so he knew the arc and the speed at which he should move. We would take the shield from him and shoot the scene with him miming it. Then we would add in a CG shield".
