The SleepSack Swaddle replaces loose blankets for safer sleep. It"s the first and only wearable blanket endorsed by the SIDS Alliance and reduces the risk of rebreathing (the inhalation of carbon dioxide), which has been associated as a possible cause of sudden infant death syndrome. The Cotton SleepSack Swaddle is made of 100% flame-resistant cotton and is great for use in warmer temperatures. Fits newborns 19" to 23" and 10 lbs. to 18 lbs. The SleepSack Swaddle hugs your baby to prevent the startle reflex - allowing your little one to sleep more soundly. The 2-in-1 system allows you to swaddle from birth, but also allows you to move the swaddle feature down for arms out. The generous sack design allows room for kicking, but can"t be kicked off so baby stays warm all night. The inverted zipper makes diaper changes easy, but won"t pinch baby"s skin. The SleepSack Swaddle features an embroidered "Back to Sleep" message to remind caregivers to place baby on his or her back. It also slips on easily over a regular sleeper or diaper and is machine washable and dryable with like colors. Features: Made of 100% flame-resistant cotton Fits newborns 19" to 23" and 10 lbs. to 18 lbs. Reduces risk of rebreathing Generous sack design allows room for kicking, but can"t be kicked off Inverted zipper for easy diaper changes Embroidered message on chest Slips on easily over a regular sleeper or diaper Machine washable and dryable with like colors