Stay warmer than Bruce Wayne in his mountain retreat with this officially licensed Batman 2-Piece Thermal Long Pajama Set. Made a comfy blend of 60% cotton and 40% polyester, this awesome 2-Piece set of grey pajamas features a thermal waffle knit on both the top and bottoms with contrast rib-knit trim, a tagless neckline interior, and a cute repeating Batman print. Machine wash cold, gentle.