The MiracleWare Miracle Blanket(R) is the number-one pediatrician-recommended swaddle in the world. This blanket is the secret to a happy, well-rested baby, as well as well-rested parents. The Miracle Blanket(R) has been proven to extend sleep periods between feedings by preventing night movement and separation anxiety. This is the only true swaddling blanket that guarantees its effectiveness with its triple patented arm flap design and length. 100% Cotton. Machine wash cold. Tumble dry low. Measures: 21" x 61". Limited Manufacturer's Warranty.