Material : 95% Cotton and 5% ElastaneColor : GreyPacking includes : 1 x baby swaddleThe Swaddle is a stretchy blend of cotton and Elastane designed to be snug and cozy around their torso and arms, thereby calm the startle reflex, allow a long, restful night's sleep for Mom and baby. The baby swaddle has lengthened and widened designed, plenty of room for baby to move their legs and hips.Not recommended use the swaddling tightly babies around the hips and legs. The baby's knees should not be locked together nor their legs held straight, especially in the first 3-6 months . The Swaddle is designed to give your baby room to move their hips and legs freely. and is recognized as Hip-Healthy by the International Hip Dysplasia Institute. The Swaddle 's dual zippered design allows you to do diaper changes while keeping baby swaddled and has no noisy Velcro design or tricky wrapping, ensuring that your baby stays good dream and comfortably swaddled all night.The arms up design can ensure baby Arms UP natural position to reduces the risk of rolling over. allow your baby access to her hands and use them to self-soothe and sleep longer.When your baby begins to roll over, it?s time to transition to Arms-Free. Open one wing button. Arms-Free design allows older babies to push up or reposition when they roll over. Single layer breathable fabric to reduce sultry troubles. S:60CM - M: 67CM - L:75CM