100% Cotton Material:Boys Pajamas Set is 100% cotton, breathable and comfortable, good for kids’ skin. Cute Style:Short Little Kids PJS feature with unique dinosaur, shark, truck and space pattern design. Boys will love it!! Humanization Design: Easy on/off toddlers crewneck T shirt & short sets. Elastic waist band for pants, ensure comfortable sleep and protect kids’ delicate skin. Occasions:Dinosaur Boys Pajamas can be used for sleepwear, daily wear, pajamas party, school or sports in summer or spring. Warim Tips:Little Boys PJS is snug fit with various types and sizes, please choose the one that fits your kid well.