Green Lantern Muscle Chest Adult Costume Costume includes muscle chest jumpsuit with attached boot tops, and mask. Great costume for you Justice League Fans! Pair this up with any of our other super hero costumes and make a Justice League of your own! Great for Halloween and Costume Parties. RU-889250. Size:Medium 38-40=RU-889250-MED, Size:Large 42-44=RU-889250-LRG