This makes the panties just particularly (unobtrusively) portable under particularly dünnstoffiger, figure-hugging clothes, which otherwise could easily draw the edges of the underwear.
Incidentally, although 40 degrees on the care label is - I wash my clothes again and again to 60 degrees. Never hurt. Except that the laundry is of course a little more strained - but that must withstand underwear, I find.
The only time in my life, I immediately had to cut out the Slip the shield. It was sewn with extremely thick and prickly thread and very unpleasant scratching on the skin. But no matter. I wear size 36 but rather Sost 38 will also sit.