From HALO®, this blanket features: Adjustable fasteners for perfect fit Immobilizes arms to prevent startle reflex or scratching 3-way swaddle that adjusts to fit baby's sleep style inverted zipper closure Allows for easy diaper changes Use over regular sleepwear Premium fabric; no added chemicals Preemie; 14-19" and birth to 5 lbs. NB: 0-3 Months, 19-23" and 6-12 lbs. Small: 3-6 Months, 23-26" and 13-18 lbs. cotton machine wash Imported.