Preparation materials: rubber band, needle and thread.

1. Wrap the rubber band around your leg, tighten it a little, and cut off the appropriate length.

2. Sew both ends of the rubber band.

3. Sew a rubber band on the edge of boots.

4, so that when you put on your boots again, it won't be as loose as before. The boot barrel of the boot is thinned under the action of the rubber band.