DTOM Fanny Pack Fat Man Belt Extender. Adds another 11 inches to the DTOM fanny pack waist size. For use with ONLY DTOM fanny packs. This item is built specifically for our packs and not other brands. There are 2 versions based on the year when your pack was purchased. Pay close attention to the pictures of the 2 buckles to know which model goes with your pack. We changed our buckles to the YKK brand mid 2023. Make sure your fanny pack buckle matches the one you purchase. MODEL X : Fanny Packs purchased prior to mid 2023 MODEL Z : Fanny Packs purchased after mid 2023