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.  size medium 6-12 months / 16-24 lbs and size large 12-18 months / 22-28lbs lot of 2!!!! 100% cotton good, pre-owned condition