Extraordinary Star Trek Klingon head piece and Alien Nation full head mask. The Klingon head piece appears to be made of a foam-rubber combination and has a 2 1/2 inch split on the crown of the piece. The Alien Nation mask appears to be made of rubber and has a 4" zipper opener/closure on the back of the piece. The Klingon piece is in overall good condition while the Alien Nation mask is in overall excellent condition. Two cool pieces from 80's-90's pop culture.