The HALO 3 Piece Sleep Set is the perfect accessory for the nursery and nap time. Each set includes a SleepSack, 100% cotton hat and a coverall. HALO is recommended by First Candle/SIDS Alliance. The Sack design is perfect for rambunctious babies as parents will never have to worry about fidgeting feet kicking off blankets. It also protects from blankets that cover the nose or mouth to prevent proper airflow. The hat is cute and will keep baby warm during some cold moments before bed. The hat should not be worn when child is going down to sleep. HALO also includes a coverall with a pretty ducky print on it. The coverall is also designed with safety in mind as it features sleeves that fold back to prevent child from scratching himself. The items are designed for an infant 0-6 months. Preemie items fit 7-18 lbs.