*Cotton *Helps your baby sleep safely and you sleep without worry all-night-long *Unique safe sleep swaddle comfortably secures your baby on their back during sleep (which is recommended by the American Academy of Pediatrics). *Reduces risk of rolling over, tummy sleeping and falling or climbing out of the crib; *Easy to secure to your mattress and baby with velcro flaps – The strong, adjustable velcro ensures a snug fit, keeping your baby safely in place. *Fits all standard size crib mattresses & mini-mattresses. *Machine washable; 100% cotton; *Recommended for babies 0-6 months/7-25 lbs