well first off I use bog standard undies (briefs) as i find boxers ride up including hipsters, while serving in the Army i used Silk undies for exercise & operational Tours (on some occasions you cant change for 4+ days!!!)
I never ever had a problem they have lasted me for years.
however i agree with Ted no matter where you are in the world you can pick up a pair of bill grundy's (undies), so don't worry.
but dont take your fav undies they might not come back! lol
We are the Pilgrims, Master, we shall go Always a little further: it may be beyond that last blue mountain barred with snow, Across that angry or that glimmering sea.