Star Wars (Darth Vader, Stormtrooper) Mens Polar Fleece Pajama Pants Extremely high quality fabric: 100% polar fleece micro-polyester; Machine washable. Very high quality mens sleepwear - satisfaction guaranteed! Star Wars (Darth Vader, Stormtrooper) logo printed allover for a classic look; Fabric covered elastic waistband with drawstrings for added comfort; Functional button fly for convenience.