The #1 choice of 1,700 hospitals in the United States, our original wearable blanket with sleeveless design nestles baby like a soft blanket without the risk of Sleep-related dangers. Signature "Back is Best" embroidery is a gentle reminder to place baby in the recommended Sleep position. Features a 2-way zipper for easy diaper changes and a roomy sack design that's recognized by the International Hip Dysplasia Institute as promoting healthy hip development. 100% cotton TOG: 0.5 Disney and Pixar's Finding Nemo joins HALO to make safe sleep more magical than ever. HALO created the first SleepSack over 20 years ago with both safety and comfort in mind.