Dr.Seuss The Grinch Mens Footed Pajama Pants with Grip Soles 100% polyester Very high quality mens sleepwear - satisfaction guaranteed! Extremely high quality fabric: 100% polyester; Machine washable. Fabric covered elastic waistband with drawstring for added comfort. Built-in feet (with grip soles) to keep your feet cozy warm. Dr.Seuss The Grinch logo printed allover for a classic look.