Mens Marvel Comics Superhero (Iron Man) Winter Sleepwear / Pajama Pants - Black & Yellow 100% Cotton 100% authentic Marvel Comics merchandise....Very high quality mens sleepwear - satisfaction guaranteed! Extremely high quality fabric: 100% cotton; Machine washable. Fabric covered elastic waistband with drawstring for added comfort. Marvel Comics characters printed allover the pant for style. Relaxed styling provides a comfortable and casual fit; Functional button fly for convenience.