Brand new in box! 3-pack of Nanit Swaddles. Size Large (3-6 months). The Nanit Swaddle works exclusively with the Nanit Pro or Plus nursery camera, to monitor your baby’s breathing motion with no sensors on their body or in their crib. The Nanit camera is able to track breathing motion by reading subtle movements in the fabric’s custom pattern, and alert you if your baby needs you. Plus, the Swaddle is snug, soft and comfy, to help them sleep soundly.