If your family members wear the Brown Scapular, you eventually have lots of scapulars to fix. The strings always end up breaking and needing to be replaced, especially if any medals are attached, adding more weight and stress on the strings. Having fixed many scapulars over the years I thought I would share my repair method.
I have found the best cord to be 'soutache braid' made by Wrights and found in the trims display along with the rick rack and seam binding products. It is made of nylon and is very durable.
I use one continuous length of cord. Measure it out so it is as long as you want the distance between the patches to be plus enough extra to go along the top edges of the wool.
Place the cording right on the top edge of the cloth. Try to keep it from twisting and make sure you are attaching the patches facing the right way. Double check you've got it right before you sew that second one on! ;-)
Set your machine to a tight zigzag stitch that is slightly wider than the cord and sew along the length of the cloth, completely covering the cord.
Voila - all fixed and better than new. We have never yet had a scapular break after it's been repaired in this fashion. :-)