The Osprey Tempest and Tempest Pro backpacks have a few key differences. The Tempest Pro will have more features than the original Tempest, including mesh water bottle side pockets, shove it front panel pocket, ice tool loops, and a suspension hip belt system. The Tempest does have a scratch-free sunglass/goggle pocket that the Pro does not have. Overall, the Tempest Pro has a few more comfort features than the Tempest.