How to tie the strap of the schoolbag more firmly and not easily spread?

1. Take off the sling and prepare a rubber band, as shown in the figure below, to tie the head. Be careful not to use too thick rubber bands, which is not good-looking.

2. Adjust the length you need to be comfortable, and pay attention to the same shoulder straps on both sides. Then pass the rubber band through the second hole of the adjusting buckle, as shown in the figure below.

3. Then, as shown in the figure below, pull up the rubber band and insert the third hole. Fingers buckle the two ends of the rubber band together, and the band goes down into the second hole.

4. Pick up the end of the strap, then insert it through the rubber band into the third hole, then through the rubber band, and finally insert it into the first hole.

5. Finally, just follow the Tula rubber band and get stuck. Then tighten the strap, and the strap will never slide down again. It is very firm.

References:

Phoenix. Com-Video: That's how girls carry backpacks.