95% Cotton, 5% Spandex Imported 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 swaddle blanket is effective and adapts to your babies growing needs; patented design ARMS IN OR 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 COMFORTABLE 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