1. After an outfit is upgraded, its "additional attribute" and "outfit attribute" will also be enhanced. You may preview the attributes of each level.
2. When upgraded to certain levels, the outfit will gain bonuses. You may preview the bonuses.
3. Once an outfit is upgraded, it cannot be reverted to a lower level.
4. The "additional attribute" only takes effect when the outfit is put on.
5. The "outfit attribute" will take effect once you have the outfit and its effect can be stacked.
6. The specialized combat suits of Heroes cannot be upgraded.