Supposedly a life span promise, but for the money if we have a calendar year or two away from them we might be happy. To this point, we like them a lot better than merino as our feet feel to stay drier. Plus they appear to be holding up perfectly. https://more-info-of-delta-801864.59bloggers.com/32905676/hush-puppies-socks-can-be-fun-for-anyone