Best Bottom Extender Tabs allow you to use the Best Bottom Shells with babies 50+ pounds! Now your baby will be able to use this one size diaper even longer. You will save even more money! Just snap or Velcro one on each of the side closures and they allow you to extend the size of the diaper around baby's tummy. They are available in both Hook & Loop and Snap in several coordinating colors. Best Bottom Extender Tabs are sold in pairs.