Batman Superman Boys 2fer 4 piece Pajamas Set (Little Kid/Big Kid) 100% Cotton Imported Machine Wash Extra soft and easy to care for; Sublimated graphics Ribbed-knit collar; Double stitched hems; Elastic waist 4 piece sleep set; Mix and Match Features DC Comics Justice League heroes: Superman and Batman Designed to fit snug; For child's safety, garment should fit snugly, sleepwear is NOT flame resistant