Preserved benefits are benefits that haven't been withdrawn (in full or part) after you exit the PSS.
While your benefit remains preserved, your member and productivity components will grow with investment returns. The employer-financed component will grow in line with the Consumer Price Index (CPI).
The benefit payable to you is the accrued amount of your preserved benefit on the day it becomes payable.
Find out more about preserved benefits in the Super book and in these fact sheets: