While distressed jeans are in fashion, so are patches this season. If you wanted a distressed look but still wanted to keep the cold out, this is a good option. This is good for using on any area except around the zipper of the inside of the legs.
Jeans fabric scrap for patch
HeatNBond Iron on adhesive
Sewing machine (optional)
Put piece of jean materials over area that needs patched and make sure it is at least an inch wider on each side than what needs to be patched and cut to fit.
Put the scrap fabric top of the paper side of the HeatNBond and draw around the edges with a pen, then cut.
On the right side of the scrap fabric, but the shiny side down on the HeatNBond (the paper side will be up) and iron with steam setting until set (about 30 seconds). Let set a few minutes to cool off - when cool paper should be easy to remove.
Turn the pants inside out. Position the patch right side (now will be shiny side) of patch to the wrong side of the jeans over the area to be patched and iron on using steam.
Optional - if you want to make it extra secure, you could turn the jeans right side out and stitch around the the distressed area at the edges where it is distressed. I do this when the area is right around the pockets in the back around the edges up to, but not on, the pocket itself.