Avengers, Assemble! We know you'll love these Iron Man Avengers Superhero Mens Sweatpants 3000 and more! The Mens Avengers Comic Book Sleep Pants are a pair of black mens pajama pants made of a cotton and polyester blend with a drawstring waistband. The Iron Man Superhero Avengers Comic Book Mens Clothing features a bright, bold, soft hand print graphic of Iron Man with the phrase, "I Love You 3000" on the upper leg of the sleep pants. The Iron Man Comic Book Fan Apparel is available in mens sizes XS - 3XL and makes the perfect gift for any guy!