Long Sleeve Premium Duvet Sleep Bag

The only cozier: the womb. A down alternative sack wrapped in silky soft bamboo rayon keeps your little nugget secure while our one-of-a-kind WONDERZiP keeps them covered, even during diaper changes. So get ready to sleep a lot. Like, a lot a lot.  Why You’ll Love It So magically fluffy you'll want one for yourself Perfectly weighted to mimic & insulate like the coziest down comforter.  Our Patented 4-way WONDERZiP zipper keeps baby covered & cozy for easy peasy diaper changes Scientific research shows that sleeping under an evenly distributed weight, from shoulder to toe, soothes baby into a deeper sleep cycle.  Being gently cocooned in a comforting weight increases serotonin & relaxation, and naturally reduces anxiety by giving the same all-over sensation as a full-on giant cuddle Wider + longer fit to comfortably fold and kick those legs Long sleeves for extra warmth TOG choose 1.0 TOG if room temperature is 70F to 75F choose 2.6 TOG if room temperature is 58F to 70F