Body shapers / Spanx
Body shapers are pretty self-explanatory—they shape one's body or, in other words, make you skinny. Women wear them underneath dresses, shorts, and sometimes even jeans. You have to keep an eye out for these because they're deceitful. Worse, though, they're nearly impossible to see. Your best bet is to think about proportions. Does that girl look like she'd have a size 24 waist line?