Uninterrupted I have spent 96 hours (4 days) in a straitjacket, with breaks up to 1 week.
However I am not looking for a tight bondage, rather to something that I can handle for long time. That renders me completely helpless, exposes me and in conjunction with the play breaks me slowly...
And we always prepare very well, including custom-made perfectly fitting straitjackets, and obviously play-partners that know me very well and whom I can trust.