Drawstrings are flexible cords or strings that are threaded through a casing, often found in clothing items like hoodies, sweatpants, and bags. They allow the wearer to adjust the fit by pulling the strings tighter or loosening them, providing comfort and security. Typically made from materials like cotton, polyester, or nylon, drawstrings can be found in various thicknesses and lengths. They are often secured with a toggle or knot to prevent slipping. Drawstrings are practical for keeping items secure in backpacks or for adjusting the waistline in activewear.