Made of 100% cotton with an elastic waistband, this Marvel Juvenile 3-Pack Underwear set is good for when your child wants to indulge certain aspects of his personality. 'The heck are you talking about, Missa SuperheroStuff Writer man' you might ask. Well, there is actually a fair amount of subtly involved with these Marvel Juvenile 3-Pack Underwear sets. They highlight the 3 different subtypes of heroes within the Marvel Universe! Wolverine, a mutant by birth denotes the species of 'homo superior'. Iron Man represents a normal person with fantastic resources and an indomitable will. Spider Man is a mix between both of them - a normal human most of his life and then exposure to certain elements gave him supernatural powers! I'm not sure if your child can follow all of that but you should probably still get them the Marvel Juvenile 3-Pack Underwear anyways. They'll thank you later!