What kind of underwear did Freddie Benson wear in IHurt Lewbert?

When Sam said to Freddie that he should wear a belt.Sam pulls Freddie's pants down, down by his ankles showing his orange boxers, but Freddie doesn't seem to get embarrassed. When Sam said to Freddie that he should wear a belt.Sam pulls Freddie's pants down by his ankles showing his orange boxers, but Freddie doesn't seem to get embarrassed.