This Skull Sock Mask is the most comfortable mask produced. The foundation of the mask is essentially a full headed ski mask, with appropriate eye and mouth holes cut out. Then rubber character pieces are adhered to the ski mask in two separate pieces - a jaw piece and a main face piece. This construction allows for ultimate flexibility, and provides life like movement of the character jaw when you move your mouth. These are by far the most comforable masks on the market. One size fits most adult and older children (12+). Try putting a wig on with the mask...they're more fun and look great!