Halloween mascot costumes are usually for a special occassion like a parade or large party. Mascot costumes typically cover you from head to toe. Rather than wearing a mask over your head, mascot costumes usually include a full head, covering both front and back of your head. 

If you're going to be wearing a mascot costume for a long period of time, you may want to invest in cooling products such as a Kold Kollar or Kold-Vest to keep you from sweating up a storm!