This sleep sack swaddle replaces loose blankets in the crib creating a safer sleep environment and is endorsed by hospitals nationwide to promote safe and restful sleep for your baby. Made from cotton with a double knit construction it offers a cozy and slightly stretchy feel perfect for swaddling. Generously sized fasteners allow a perfect customizable fit and you can adjust the swaddle for arms in to reduce startle reflex one arm out hand to face for self soothing or two arms out to transition to a sleep sack. An inverted zipper opens from the bottom allowing easy diaper changes without disturbing your baby swaddle and the sleeveless design minimizes overheating risk while snug arm and neck openings ensure a secure fit. It is available in multiple sizes to provide a snug secure fit throughout your baby early months.