Merica' Marlin ZippyThis zipper pajama is made from the softest, most breathable bamboo viscose. The stretch allows baby to grow, making the jammies last longer than average. The two way zipper makes diaper changes a breeze while keeping baby cozy. You can choose to use the fold over footies to keep baby's toes warm and the fold over mittens to keep baby from scratching if needed. Sizing runs snug.