Use over regular sleepwear to take the place of loose blankets; 100% polyester micro-fleece * Unzips from the bottom for easy diaper changes; Generous sack design allows room for kicking, but can"t be kicked off so baby stays warm all night; Sleeveless design reduces the risk of overheating * Used by hundreds of hospital nurseries as their product of choice for teaching parents safe sleep practices * Embroidery reminds caregivers to place baby on his or her back * Portion of every sale goes to First Candle/SIDS Alliance and The Canadian Foundation for the Study of Infant Deaths