Love to Swaddle Original is the only swaddle with patented wings, that allows your baby to sleep in a more natural position with their arms up & legs splayed. Arms up gives your baby access to their hands for self-soothing. Medical research suggests that swaddling and self-soothing can help babies sleep. With hands up in the wing position babies can bring their hands to their mouth or gently touch their cheeks. These actions are very important for two main reasons: it may help the baby self soothe therefore settle better and babies learn about the world through hand to mouth actions even when they sleep. Therefore having access to their mouth may assist with development. 93% cotton, 7% elastane.