Woombie Original Baby Swaddling Blanket Soothing, Cotton Baby Swaddle Wearable Baby Blanket The Original Woombie is light, breathable and the easiest swaddle in the market! One step swaddling is easily accomplished using our patented design with a multi-dimensional stretch and zipper to prevent unraveling throughout the night. The perfect stretch for your baby’s needs. Cotton/Spandex blend. 2way zipper. Dress baby accordingly underneath. 95% Cotton/5% Spandex