1, buy a new tape

The underwear shoulder strap is loose, which means the shoulder strap needs to be changed. If the whole underwear is loose, it is recommended to put on new underwear. If the shoulder strap is loose and you don't want to waste underwear, you might as well buy a new shoulder strap and put it on.

Step 2 adjust the shoulder strap

The underwear shoulder strap is loose. See if you have adjusted the button of the shoulder strap to suit your position. Just adjust it.

Step 3 sew from the side

If the above two methods don't work after use, you may wish to fold the shoulder strap for a short period and sew it with a needle and thread, so you don't have to worry about the shoulder strap slipping off because it is too loose.

Method for adjusting shoulder strap:

First pick out a shoulder strap, pick out the shoulder strap on the surface from the adjusting buckle, and pull out the appropriate length. Note that the length should not be too short, because too short a shoulder strap will cause underwear to run.

Secondly, lowering is locking, and raising is loosening. After adjusting one side, the other side should be adjusted by the same length. Pay attention to the length of both sides, otherwise one side will be high and the other side will be low.

Finally, you can also directly pick up the adjustment button and move it up and down to adjust it to the length you need.