New, never wear. Wearable blanket for safe sleep Keeps them cozy and can’t be kicked off Designed for a seamless transition after HALO SleepSack swaddle Zipper opens from bottom for easy diaper changes Micro-fleece fabric is soft and super cozy Hip healthy design; approved by the International Hip Dysplasia Institute Extra length (so you don’t have to size up as quickly!) Comfy neckline with zipper covers to prevent scratches Premium quality SleepSack brand is used in over 1,800 hospitals nationwide Machine washable Use over regular sleepwear 1.0 TOG 100% polyester