GroViaShells are designed so that the outer shells may be used for multiple diaper changes. If the soaker pad is wet, simply snap in a fresh one and you are ready to go. If the Grovia diaper shell is wet, allow it to air dry and use for the next diaper change. When your GroVia diaper shell is soiled or very saturated, start fresh with a new GroVia Shell. Grovia diaper shells can also be used with Grovia's disposable biosoaker inserts.