Examination of the toy figure's blue suit reveals a helmet design similar to those used by deep sea divers. Actually, the purpose of a space suit and diver's suit are similar. Each shields the wearer from a harsh environment which is lethal to unprotected humans. Both must deal with harmful pressures. Both must provide oxygen for respiration. In the case of the diver's suit, the extreme pressure on the diver's body must be eliminated. A spacesuit must compensate for the lack of pressure on the astronaut's body. Experience gained in design and fabrication of diver's suits proved valuable to space suit design.