The tempest boots degrade to dust after 100,000 charges of combat, and cannot be repaired. Fighting in Raids does not degrade them at all. When wearing the full regular or Achto Tempest set, or a mix of the two, there is a 2% chance per piece that all of your defensive abilities will have their cooldowns reset. When this happens, there is a 1 minute cooldown before they can be reset again. Wearing the tempest boots also doubles the chance of getting the Achto Tempest Boots as a drop from one of the Raids bosses. If you die in the Wilderness with the tempest boots, it will drop 3,000,000 coins instead of the item.