Swaddling calms colic and helps babies sleep better - and sleep plays a key role in your baby's cognitive and physical growth. KeaBabies Soothe Zippy Baby Swaddle Sleep Sacks provide warmth and snugness that mimics a cozy environment, offering a safe sense of calm for your baby. Designed for newborns and infants 0-3 months Sized generously at 21.5" by 11.5" Fully-lined bottom zipper for easy diaper changing Made with breathable and ultra-soft Organic Cotton (GOTS certified by CU 1042833) Machine washable and dryer-friendly