Apologies if this has been discussed already. I wanted to post this in case anyone else was looking for a good backstop material that did wear out after a few 1000 shots.
I've been using this ballistic nylon mesh I got from Amazon for about 1 month now and it still hasn't worn out. I shoot about 300 shots a day. I started to run out of old t-shirts and towels to use for my catch box. I was also sick of having to constantly take the time to replace the backstop.