"The public restroom struggle is real," my sister-in-law laughs. "Maybe I'm just not used to full-body onesies, but man, this part is awkward. There's no real fix for it — just part of life ...

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So when I saw the new (well, sort of new — they're something of a throwback to 80s-style unitards) trend for workout onesies, my interest was immediately piqued. After spotting an increasing ...