Just go buy some bandannas or some old shirts/whatever wherever you can get em cheap (bandannas almost anywhere, shirts a thrift store) or even some old jeans and sew patches inside by hand. When the patch rips out, take a razor blade to your stitching, pull it off and put on a new one. i say use bandannas cause they are cheap and thin, so the patch wont stick out/get gnarly around the edge and tear your leg up. Plus they have cool print, maybe get some with skulls or something. That adds to manly points.