drawstring
/ˈdrɔːstrɪŋ/
noun
- A string or cord that is threaded through a casing or hem and used to tighten or close an opening, such as on clothing, bags, or curtains.
- The backpack closes with a simple drawstring at the top.
- He replaced the broken drawstring in his sweatpants with a new one.
- She pulled the drawstring on her hood to keep the wind out.