These bat wing style sleeves were the sleeve style of the 80’s. One long continuous extension, dolman sleeves were like webbing between your wrists and your waist. Instead of a 'set-in' sleeve with a stitched armhole, this sleeve was a continuous extension of shirt to sleeve.
This sleeve style was found in casual cotton sweatshirts, sweaters and disco tops. While you might not have been able to soar through the air like a flying squirrel, you looked like you could, and that was half the battle.