They are at least 6-7 yrs old. These are great shoes! FAIL I purchased this product and have used for approximately 150 reps over a span of a month. I first removed everything from one cupboard shelf, then I placed one of the step-shelving units onto that cupboard shelf and spread it out to the maximum width of the shelf. trust me for the past 4 years Ive been trying to get a good waist trainer I even spent tripple the price on waist trainers that were no were close to this. I thought they sounded great the first few days. I was very enthused when she got it as we really needed a soundbar and this one looked good. I especially like that they fit over the ear rather than just sitting on the ear. Mainly, just know Birkenstocks can be repaired and can last a very long time with care and maintenance.