HALO® SleepSack® is an award-winning wearable blanket for safe sleep. It’s also the recommended next step after SleepSack Swaddle for a seamless transition without losing sleep. Design details include a zipper that opens from the bottom for easy diaper changes, and a roomy, extra long sack. That means it’s hip healthy and you won’t have to size up as quickly. Micro-fleece fabric is soft, super cozy and gentle on baby skin. Size Large