Years ago when our Son worked in a lumber yard I mended his heavy work socks. I also sewed large patches on the front of his blue jeans. The rubbing of the boards against them wore them out fast. So heavy I sewed them all by hand using pliers to pull the needle through.
Other than sewing on a button or hemming my shorts I don't mend a blooming thing. I saved money all of my younger years. Now I just want to make quilts.