How can I filter on prepack value?

1. You have the option to set a default filter for this. Go to the settings module and click on products.
Then tick the box of the option ‘is prepack’ in the product filters.
​2. You can filter on prepacks with a custom filter. To do this, go to the custom filters module.
Select ‘yes’ in the list box next to the option ‘contains prepacks’.