This is not the original bamboo sleep bag; think better. Meet the wider, more comfortable fit for folding legs in the natural frog position with our one-of-a-kind WONDERZiP® to keep your Little One covered, even during diaper changes. Our 1.0 TOG sleeping bag with a down alternative fill wrapped in silky soft bamboo rayon keeps baby warm, snuggly, and most importantly asleep all night. So get ready to sleep a lot. Like, a lot a lot.