For over 60 years, NASA has inspired people young and old alike that the stars are the limit, literally! NASA or the National Aeronautics and Space Administration is the leading space exploration team in the world! With multiple legendary missions, including Apollo 11--the spaceflight that put humans on the moon! The pajamas themselves feature the NASA logo on the pant leg. The pants themselves are made of a soft 60% cotton and 40% polyester fabric blend, for casual wear and lounging about!