Use over regular sleepwear to take the place of loose blankets; 100% cotton waffle knit * Unzips from the bottom for easy diaper changes; Generous sack design allows room for kicking, but cannot be kicked off so baby stays warm all night; Sleeveless design reduces the risk of overheating * Used by hundreds hospital nurseries nationwide as their product of choice for teaching parents safe sleep practices; Recognized as hip healthy by the International Hip Dysplasia Institute * Embroidery reminds caregivers to place baby on his or her back * A portion of every sale goes to First Candle/SIDS Alliance and The Canadian Foundation for the Study of Infant Deaths