How are modern space suits different than the first ones?
Early portable life-support systems were cumbersome and often very tiring to use. In the Mercury, Gemini and Apollo programs, each space suit was tailored to fit a specific astronaut. Today’s Space Shuttle space suits come in two major pieces, each of which comes in several different sizes. They have more flexible joints than early space suits, and better environmental controls. They also can be repaired and reused many times.
