High Quality and Comfortable Material : Made of 95% Cotton + 5% Elastane. feeling snug fit from our stretch fabric. creates a familiar and secure feeling, just like in the womb to calm the startle reflex. | Lengthened and Widened design: Lengthened and widened lower body design is good for baby bone growth. Not recommended use the swaddling tightly babies around the hips and legs. The Swaddle is designed to give your baby room to move their hips and legs freely. | Double Zipper Design : The double zipper design can effectively protect the delicate body of the baby, and it is convenient for parents to change the diaper or wipe the cream and apply body lotion for the baby. eliminates the need to remove the swaddle. replaced noisy Velcro or some snaps. | The Unique Wing Mitten Cuffs Design : The wings design allow Open or close. Allow your baby access to her hands and use them to self-soothe and sleep more longer. It also can calms the startle reflex. When the wing closed allows older babies to push up or reposition when they roll over. | The Medium Size fit babies within 67cm length. approximately 3 - 6 months.The max child height is 27 inches.