Preparation materials: thick rubber band, scissors, needle and thread.
1, the waist of warm pants is generally double-layered, and a small hole is cut in the inner layer of the waist.
2. Fix the rubber band on a big hairpin.
3. Pass the big hairpin through the cut small mouth.
4, after a circle, and then through the small mouth.
5. Adjust the rubber band to the length suitable for your waistline and sew it on.
This way, the modified warm pants will not fall off again.