HALO created the first SleepSack over 20 years ago with both safety and comfort in mind. The #1 choice of 1,700 hospitals nationwide, their original Micro Fleece 1 Tog 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 an inverted zipper for easy diaper changes and a roomy sack design that's recognized by the International Hip Dysplasia Institute as promoting healthy hip development.