It really depends on the brand. - I buy basic clothing from a famous sports store, and they change a large part of the articles essentially every year, even th

It really depends on the brand. - I buy basic clothing from a famous sports store, and they change a large part of the articles essentially every year, even the underwear; - I tried to buy a trousers with the same model of 3/4 years before, from a rather famous (in the country I live in) brand, and it was not available anymore; - I tried to buy t-shirts with the same model of 3/4 years before, again from another rather famous brand, and it's not available anymore. - My runners are a certain model from a very famous brand, which produces a new version every 1-2 years; I thought at least the size would be the same: nope.