No more strapping a dry bag with no shape to your rear rack! The Old Man Mountain Atlas is designed to work with most racks, but pairs especially well with the Old Man Mountain Elkhorn or Divide racks. The Atlas boasts 9 liters of storage in a structured shape, allowing your dropper post to move freely. A sturdy strap system ensures the bag won’t migrate around your rack or squish into an odd shape like other typical dry bag solutions.