The garment in question is a formal coat, typically black but also available in midnight blue or other colors, distinguished by satin or grosgrain facings on the lapels and buttons. It is traditionally worn with matching trousers that also feature a satin or grosgrain stripe down the side. For example, a man attending a black-tie event would typically wear this specific type of jacket.
This formalwear piece carries significant symbolic weight, representing elegance, sophistication, and adherence to established dress codes. Its origins can be traced back to the late 19th century, evolving from informal smoking jackets into a staple of formal attire. Its continued relevance stems from its ability to convey a sense of occasion and respect for tradition, while also allowing for individual expression through subtle variations in style and accessories.