I can’t say that I have a definite lifespan, all things considered. There are days when the tail is almost gone and they still hit it with abandon. Next trip they won’t touch it, go figure. I fish lots of grabby stuff so they take quite a beating. I knock the paint off of factory jigs in record time. Trolling they last a very long time. I guess snags claim most of my losses with not retying enough being second.