Developmentally Appropriate: Designed for babies aged 6 to 12 months, providing them with more freedom as they undergo developmental changes while still offering the security needed for longer sleep. Hands In Out Design: Retains all the features of the Sleepy Hugs Original, with the addition of fold-over cuffs that can be opened to allow the baby to self-soothe before sleep or closed to provide security throughout the night. Natural Sleeping Position: Allows the baby to sleep in their natural position, promoting comfort and better sleep. Safe Rolling: Enables the baby to roll safely during sleep and push up with straight arms when on their tummy. Security and Comfort: Provides just enough security to help the baby sleep longer while allowing for gentle transitioning to free arms. Cool Summer Fabric: Made from breathable soft mesh-like organic cotton fabric, promoting air circulation around the baby's body to keep their temperature cool and constant during warm summer nights. Features: Signature top and bottom opening zippers for easy nappy changes. Fold-over cuffs that allow hands to come out for playtime or self-soothing, and close to keep hands warm inside. Wide sack accommodates a hip dysplasia brace. Size: Suitable for babies aged 6 to 12 months, providing a proper fit for infants and toddlers. Overall, the Baby Loves Sleep Hands In Out 'Cool' sleep sack offers a comfortable and practical sleep solution for babies transitioning from swaddling to free arms, ensuring support, security, and comfort during warm summer nights.