Sleeveless black express blouse - XS

Stylish, work-appropriate, fun details! This black sleeveless blouse has a small triangle cut-out in the neck, a gold zipper partially down the back, and is long enough to tuck into pants or go untucked. It’s fairly sheer so I always wore a camisole under it. There is some minor discoloration under the arms but when I look up close it’s less white and more glittery. How? Idk.