The Sweater Vests
They appeared on the fictional 1963 music variety television show Poptime, which was cancelled after only 13 episodes. They sing their current hit "Tight Pants."
Despite their name, they are clearly NOT wearing sweater vests, but just plain long-sleeved V-neck sweaters. Dammit people, how hard is this?! If the wardrobe department can't find some freaking sweater vests, then just rename the group "The V-Necks," c'mon! Sheesh!