Licensed Batman pajama set Printed elastic legs Comfortable waist band Soft and breathable fabric textureCotton fabric makes you feel comfortable with its soft and breathable texture. Products designed for children's ergonomics allow freedom of movement. All day long, soft and comfortable, stretchy free. This product contains 100 cotton. Cotton is a natural fiber. Made of pure cellulose. Cellulose is an organic substance that is synthesized in nature. It has low elasticity. It absorbs moisture well and keeps heat cool by moving it out of the body. Care Instructions Wash at maximum 30C. Do not tumble dry. Do not use bleach.