|I have some L AFs that have been in use for probably over three years. Through two children, anyway, and they are still going strong. Anecdotally, this doesn't seem to be an abnormally long life span, but there have also been people on the forum who have noticed them starting to go sooner. ME guarantees them for a few (maybe five or six?) months or so, but they do last longer than that. I suspect that much depends on how many are in rotation (I have , how they are washed/dryed (hot vs. cold, air-dry vs. dryer, washed with things that could snag them, like open zippers) etc.