Take their style out of this world with this boy's 4-pack NASA pajama set. The set features a blue and black short sleeve tee with an image of an astronaut surrounded by stars and the NASA logo, a black short sleeve tee with all-over print of space shuttles, a matching pair of black sleep shorts with the same design, and a pair of solid blue sleep shorts, bringing the thrill of space exploration to their sleepwear. Made with FR jersey polyester, this set provides comfort and safety. For the best results, turn inside out and use detergent to retain flame resistance. Do not use fabric softener. Machine wash cold with like colors and tumble dry on low heat. Do not iron. Do not dry clean. This pant does not have pockets Fabric and fit are important safety considerations for children’s sleepwear. Sleepwear should be flame resistant or snug-fitting to meet U.S. Consumer Product Safety Commission sleepwear requirements.