This is a Christian Dior "loungewear" 1970s piece originally intended to be worn when spending time at home.
However, we recommend wearing this piece whenever ... and wherever! The zip up front gives you the opportunity to slip a bra-let below and bare some skin.
Or, wear as-is and belted for a more dress-like style.
The ascot design gives this designer piece a more formal vibe.
Or, wear poolside with a bathing suit before taking a plunge.