Flash sales are pretty brilliant--they generate excitement, urgency, and (typically) offer a quality product--which means they're a great way for brands to make overstock almost magically disappear. So we were thrilled to hear that Canadian label-to-watch complexgeometries--which you can find at retailers like Oak and Selfridges--is throwing its very own flash sale tomorrow, starting at midnight EST. Everything in its e-commerce boutique is 40%, from the extra-long leggings that can be worn as a bodysuit to a versatile oversized crop top. Just visit complexgeometries.myshopify.com after midnight and enter discount code onedaysale at checkout. This is a pretty great sale, if you ask us.