ISO is the currency earned either by getting it as a drop from a loot box, or by converting a duplicate cosmetic from a lootbox.
ISO can be used to buy any cosmectic which is not considered exclusive. Exclusive items may include but are not limited to:
- Season rewards for earning a high season level
- Golden Age styles from the Trust Edition
- Banners and styles from Trion World's Creator Program
- Styles from giveaways like curse.com or Razor beta key giveaways