The swaddle up by love to dream 50/50 is designed to gently transition babies armless swaddle making future transition from swaddle to sleeping bag easy. The swaddle up 50/50 will help limit the disturbance to your baby's sleep routine, so everyone is well rested! The 50/50 can be used just like the original swaddle up by love to dream until your baby is ready to start transitioning. Then, when they are ready, it's easy to zip-off one or both wings, so the swaddle becomes an arms free sleeping bag, that is still snug and secure. The swaddle up by love to dream 50/50 is made from cotton elastane, which is breathable and stretchy. This helps to reduce the risk of overheating, which can be extremely dangerous for bubs.