The phrase "drawstring detail" refers to a type of design where a string or cord is used to gather or tighten parts of a clothing item or accessory. Full definition
Vintage jacket by Issey Miyake circa 1990s Woven in drawstring detail in front Oversize fit 100 % cotton Condition: Great vintage condition, with some expected fading of fabric due to... (1stdibs.com)
Featuring an oatmeal hue stretchy fabric, long sleeves and a ruched drawstring detail on the front, this crop top can be styled up or down. (prettylittlething.us)