Jeans and T's ?
Actually that is correct. For most Long Haul cargo carriers you may wear whatever you like* once in cruise and (obviously) out of the Public Eye. Hub turns/Domestic stuff...It wouldn't make sense to change clothes every 2 hours or so.
14 hours from Australia to San Francisco ? ...I'm in my Jammies w/ Fuzzy Slippers ASAP !
STK
* - However, The Borat Mankini is generally frowned upon.