Step 1: Thread it through
Take the end of the single-tie string and thread it directly through the fabric loop on the opposite edge.

Step 2: Cinch it up
Pull the string through the loop until the two sides of the top meet and it feels comfortably snug.

Step 3: Tie it off
Wrap the string around your fingers to create two loops, then cross and tie them together into a standard bow to secure your fit.