Vintage Jumpsuit by the designer Hélène Sidel, sold at iMagnin. Size Small

Era: Likely 1970s or 1980s, given the style and the "I. Magnin" label, a store that closed in the 1990s. The cut, with the long sleeves, high collar, and elasticated waist, is characteristic of the late 70s to 80s. Style: It's a black jumpsuit with a subtle, shimmering vertical stripe pattern in a metallic gold thread. There are also embossed or jacquard-style polka dots throughout the fabric, creating a layered texture. Details: The jumpsuit features a high, stand-up collar, a buttoned placket down the front, and long sleeves with buttoned cuffs. The waist is elasticated for a comfortable, cinched-in fit. The legs are straight. The fabric seems to be a lightweight, sheer material.