make shhh happen™ Sleep like before you had kids (yes, we’re serious). Meet the wider, more comfortable fit so they can fold their legs in that oh-so-comfy natural frog position, with our genius WONDERZiP® to keep your little one covered, even during diaper changes. Our silky soft bamboo rayon sleep sack with a down alternative fill keeps baby warm, snuggly, and soothes baby to sleep all night. So get ready to sleep a lot. Like, a lot a lot.