For at least thirty years, I've been using a great, inexpensive, little tool called the Speedy Stitcher for making and repairing all kinds of hunting and other outdoor gear. I put a video on my blog about using it to repair a pair of torn coveralls

There is also a full video review and demonstration of using it to repair a tie-down strap here

As I say in the review, I've probably saved fifty times what I paid for it. I'ts one of the most useful tools I own. Hope you all find this useful.
One does not hunt in order to kill; on the contrary, one kills in order to have hunted - Jose Ortega y Gasset