Posted By Gary L Afternoon I can't see a date on my pair so I will probably use them until they leak. I suppose their lifespan will depend on what you are working/walking in. Gary

Posted By Helen Horton They do deteriorate with age even if not used and kept in a storeroom so regular checks of those on the shelf might not go amiss. Little cautionary tale follows: Dad works for building company, Daughter off on biology field trip has no wellies, co-incidentally Dad told to clear out a storeroom in the builders yard and brings home pair of wellies for Daughter's week in Wales. In the middle of torrential rain Daughter is up to her knees in salt marsh mud, feet feel wet and cold. Pulls feet out of mud and finds that all the rubber has dropped off the instep of the boots and all she is wearing is what looks like a thin pair of white cotton socks. Yes I was that Daughter - but it was also a long time ago!! LOL

Posted By Chris Pope Main danger is slipping over - user responsible for checking tread wear