YSL touts this as a “form-fitting” formula, and hence the latex in the name, it’s meant to cling to lashes and “stretch” them, making them appear longer and defined. In other words, it’s the makeup equivalent of gym wear. Besides stretching, the brand claims that it sculpts and lifts lashes without clumps, and that’s all down to the uniquely tapered bristle brush, which boasts no fewer than 496 tiny bristles to capture the tiniest of lashes — even the hard-to-reach ones in the corners. On top of all that, it’s sweat- and smudge-resistant.


