For a smooth transition to independent sleep. The patented easy zip-off wings help your little one to adjust to sleeping without their arms swaddled. This ensures fewer disturbances to your baby's sleep routine as they transition from being swaddled into a sleeping bag, one easy step at a time. The Love To Swaddle Up 50/50 can be used just like the Love To Swaddle Up Original until your baby is ready to transition. Just zip off one wing so that one arm is free and the other is still swaddled. After a few nights, simply remove the other wing. Congratulations Your baby is now transitioned The transition period should only take a matter of days. Once both wings are removed the '50/50' becomes a snug and comfy baby sleeping bag which continues to give your baby the sensation of swaddling with arms free. 93% cotton, 7% elastane.