In several posts we've been advised to bring extra socks/underwear/sports bras... are there any regulations on those, or can we bring whatever type we want? I seem to remember someone saying that socks have to be white and long. In our instruction book it says that bras can be white or beige. What about underwear? Are there color regulations, and do they have to be the brief type? Basically I just want to know what to look for when buying stuff so that it won't be taken away when I get to WP.