The Marvel empire is famous for its comic books, but the brand regularly comes up with merchandise featuring its famous superheroes like Spider-man, Iron Man and Captain America. While bedding items are some of its usual staples at shopping sites like Amazon, Walmart or Pottery Barn, and many children have grown up sleeping on comforters and bed sheets with their favorite Marvel characters, the company is releasing new bedding designs that cater to its adult fan base.

These Marvel adult comforter and sheets still feature the comic book heroes, but the designs and colors are more sophisticated. Gone are the bright comic book illustrations as the grown-up designs are done in mostly black, gray and white with some hints of color in the illustrations. They go perfectly well in an adult's bedroom.

The sheets come in two standard sizes - Twin/Full (72" x 86") and Queen/King (94" x 90") - and are made of 100 percent polyester material, according to Comic Book. Retailing between $49.99 to $79.99, the sheets would make great Christmas presents for comic book fans who have not outgrown sleeping in "awesome bedding," according to Think Geek.