In reply to mypyrex:
Think the longest I have managed is a week. There is some kit after heavy exercise use over a week that I have just binned. Stink does not even begin to describe it. If you can change your base layers or it is cold and arid it is mot too bad. But in humid climates, yuck.
There was some fabric boots I tried to leave under a bed in a hotel in Brazil (after 5 months of continuous use in the Amazon) before catching a bus to Beunos Aires, Argentina and a flight to Australia. The hotel staff chased after me with them. I managed to bin them before jumping on the bus.
Post edited at 17:17