I’m a shopping editor, and this on-sale mascara is the only one I keep repurchasing

YSL's Lash Clash Mascara has serious staying power. Nordstrom; Hannah Southwick As Page Six’s Associate Shopping Editor, I’ve tried plenty of mascaras over the years — but only one has become my absolute must-have. While I used to be skeptical of an over-$20 mascara, since testing out YSL Lash Clash, I haven’t turned back. And since the one thing I don’t like about it is the price tag, year after year I stock up by buying a discounted duo during the Nordstrom Anniversary Sale. Since YSL products hardly ever get marked down, it’s truly the golden opportunity to try them for less. (The sale ends on August 9, but I wouldn’t be surprised if this set sells out before then.) YSL Lash Clash Extreme Volume Mascara Duo Yves Saint Laurent While a lot of volume-promising formulas can cause clumping,