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The current space suits used by NASA started out with the same goals as the ones stated here, and wound up making compromises. Astronauts in space suits have to wear "Depends" to take care of their toilet needs because coming up with modular plumbing for both men and women of various sizes was just too hard and expensive. (Remember that crazy astronaut who made the drive from Houston to Florida nonstop wearing an adult diaper? This is probably how she came up with the idea.)

I don't know how NASA is going to make a suit that lasts for 120 hours...