These are a replacement string puller for your hoodies, but you can also print for other hoodies! I printed all the files with my ender 3, they didn't come out very well, due to the poor quality of my printer.
printed in several colors. At first I thought about using PETG, but normal PLA works and looks just fine. Even the washing machine seems to be no issue (washed 2 times without anything noticable on the printed parts)
on the string of your fleece, you will have the final part which is hard.
you have to insert the printed piece through the sapgno, once inserted you bend the ''hard piece'' at 180 degrees so that the hard piece touches the string of the sweatshirt, then pull the printed piece and it will get stuck.
Sorry for the explanation, but it's hard to explain