3,112. Laundry Tags
Hilchos Kilayim 10:22
One may not make the following out of shaatnez: hand towels; cloths used to dry utensils or land; the mantles of Torah scrolls; the bib worn when getting a haircut. This is because one handles them manually, so they always wrap around the hands and warm them.
Hilchos Kilayim 10:23
Regarding the tags that laundries and weavers put on clothes so that their owners can identify them, if a wool tag is put on a linen garment or a linen tag is put on a wool garment, it’s prohibited even though it’s not significant to the wearer.