Assemble your superhero crew Avengers Invitations! These postcard-style party invitations feature comic book-style, action-packed images of Thor, Iron Man, Hulk and Captain America. The reverse side has a S.H.I.E.L.D. headline and a form to fill out the party's details. Complete your Avengers Invitations with the included save the date stickers, blue envelopes and shield envelope sticker seals.