Original: One of the panj kakaar (five articles of faith) that Sikh men wear is a type of underpants called the kaccha, which are similar to boxer shorts.
Simplified: Sikh men believe that they should wear the panj kakaar (five articles of faith) with them all the time to help them remember their faith. One of the articles is a type of underpants called the kaccha, which are similar to boxer shorts.