Tommee Tippee The Original Grobag Steppee Baby, 6-18M, Little PipTommee Tippee New Steppee Gives Your Child All The Comfort And Safety Of A Sleep Bag But Allows Them To Walk, Jump And Play Without Having To Remove It. Giving You All The Comfort And Safety Of A Baby Sleep Bag But Allows Your Child To Safely Walk, Jump And Play Designed At The Bottom To Allow A Natural Hip Healthy Leg Position, As Approved By The International Hip Dysplasia Institute All Bags Have An Easy Zip Opening Thats Perfect For Night Time