Self-Soothing: Woombie Convertible Swaddle is a wearable baby blanket that encourages back sleeping and eases the transition from womb to world; the stretchy but snug fit moves "with" the baby, re-creating a womb-like environment and simulating the feeling of being held, touched, and cuddled Innovative Design: Designed by an RN BSN and nursing team, this ergonomically shaped swaddling blanket is effective and adapts to your babies growing needs; patented design Arms In and Out: Depending upon baby's needs and milestones, arms can be snuggled in for sleep or out for rolling, playing and use in strollers Easy to Use: No origami required, this easy to use, one step baby swaddle will not unravel as a blanket can; two-way zipper allows for easy diaper changes Comfotable and Breathable: The 95% cotton 5% spandex fabric promotes gentle airflow; the design is hip and shoulder friendly and the narrowed waistline gently compresses the tummy, providing additional comfort for your baby The Woombie Convertible Baby Swaddle helps moms swaddle the way nature intended. This wearable blanket is ergonomically shaped with a 'hip healthy' design and and arms-free interior encouraging self-soothing in the Hands Over Heart recommended sleep position. Mild compression mimics the sensation of touch and two way zipper prevents unraveling throughout the night. The cotton/spandex blend fabric is light, breathable and provides a multi-dimensional stretch. Arms open to convert the swaddle to an arms-free sleeper, allowing two options to do what's most comfortable for your baby. Dress baby accordingly underneath depending upon season and nursery temperature.