I have used iron-on patches, but they have always come off after a few
turns in the dryer and they are too tough to sew. I would get some
fusible webbing at a fabric store, medium or heavy weight. Cut to same
size as your patch, iron onto inside of jeans...instructions with the
webbing. Stitch around the edge of the patch to be sure it is secure
and doesn't loosen in the laundry. Webbing is avail. by the yard and
not costly. Handy to have on hand. Blanket stitch on the edges of the
patch would help keep it from fraying and stitches should be small so's
they don't look ugly on the outside of the jeans.
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