It's called the Speedo LZR Racer. Credited with dozens of world records, it's not sewn but welded together, was engineered by NASA, produces 38% less hydrodynamic drag than a normal bathing suit, covers from ankle to neck and has all but ruined my favorite spectator sport since I could say "libido": men's swimming.
It's only normal that performance trumps the swimmer's sex appeal and yes, in this case the women are wearing them too, but men's sportswear isn't all dictated...
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