Nested Bean Zen Sack Classic Cotton Night Sky , size 0-6 months Our Zen Sack Classic wearable blanket is designed for self-soothing and sounder sleep. The gently weighted Zen Sack provides uninterrupted comfort by applying pressure only where babies are naturally held. This secure feeling eases the swaddle transition and helps babies self-soothe through sleep disruptions. In good pre owned condition No flaws