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In short, you feel pretty badass in the LZR. That is no accident. When designing the suit, Speedo also probed swimmers’ psyches. “We asked them how they wanted to feel on the blocks,” Brommer says. “Michael Phelps said that he wanted to feel like Superman.” Did it work? “I feel better in the water than I have in any other suit,” Phelps says.

- Susan Casey: Taking a swim in the Phelps suit - 2008 Olympics - SI.com