These are just like a hug in a bag! Perfect for babies who need a bit more encouragement to fall asleep. The lightweight chestband inside the bag is secured with baby proof Velcro, giving the child a sense of security without the feeling of confinement or restriction of movement. Suitable from birth to 3 months. Safety: Always place your child’s feet at the end of their cot or as recommended by manufacturers guidelines. We recommend layering your babies clothing appropriately to avoid overheating.