The sleep suit is suitable for use from newborn to 6 months or when your baby is 68cm tall. Please ensure to follow the safety warnings below: WARNING! Do not use if the child's head can pass through the neck opening when fastened for use; WARNING! Ensure that the neck and arm openings are securely fastened; WARNING! Do not use if the child can climb out of the cot; WARNING! Do not use in combination with cot duvet or blanket. Take into account the room temperature and the child's sleepwear.