From The Calvin and Hobbes Wiki
"Some days even my lucky rocketship underpants don't help."
--Calvin
The lucky
rocketship underpants are
Calvin's favorite underpants, and he often wears them when he feels he needs some extra luck in his day. Unfortunately for him, this seldom seems to work. He also once commented 'What's the use of wearing your lucky rocketship underpants if no one asks to see em?' He also has cartoon character underpants as he mentioned them in one strip.
The aforementioned strip, where
Calvin gets angry that he can't wear his cartoon character underpants.
[edit] Appearance
They are "tighty-whitey" style underwear with rocketships printed on them.
Some days, even
Calvin's lucky rocketship underpants don't help.
