I take a glue stick like used in a hot melt glue gun. It can be melted with a BIC. I fixed a shoe which had the sole coming loose and it lasted for another three days. One time I had the zipper on the fly of my pants break on Isle Royale where there were a lot of people around. I did not have anything with me to repair it so I found the guy with the biggest pack and he had an extra twenty or thirty safety pins. I started carrying a simple repair kit after that.