calm the fuss down™ Better than sliced bread, our bamboo swaddle wrap for newborns through 3 months features gunamuna’s genius easy-change WONDERZiP® to keep baby swaddled during those midnight diaper changes. Wrap ‘em up arms in or out with an optional built-in belly band and a wider, more comfortable fit to fold legs in the natural frog position, then watch them sleep. And sleep. And sleep. The only thing cozier: the womb™.