x REVOLVE Rumi Gown

This floor-length column dress uses a high-shine, tonal sequin grid to create a liquid, armored effect against the body. The architectural one-shoulder cut is balanced by a sharp, high-thigh side slit, emphasizing a vertical line that leans into the high-octane glamour synonymous with Costello’s studio. It is a study in precision tailoring, designed to catch light rather than drape softly.

Safety Rating: Lowest

Analysis: The garment is composed primarily of polyester, nylon, and spandex, all of which are petroleum-derived synthetic polymers. These plastic-based fibers lack natural breathability and create a barrier that can trap heat and moisture against the skin.