The Marks & Spencer M&S Baby Sleeping Bag in navy stripe is designed specifically for children aged 18-36 months. This sleeping bag provides a safe and cosy environment for your little one to sleep snugly during naptime or bedtime. With its striped design, this sleeping bag adds a stylish touch to your child's nursery bedding collection. Perfect for keeping your baby warm and comfortable while they transition from a swaddle or sleep sack.