To include a product as an Add-on with multiple variants such as a shoe rental, you’ll first ensure that the shoe rental product is listed in the product catalog along with all size variants.
Add the product to the Buy PAge by going to Products > Buy Pages > Add-ons > Edit. Click Add Another Section to add a section for your shoe rentals
Provide a section name and then click Add Product or Promotion.
Select if you want to offer all variants (sizes) or certain variants. Click Update Section > Update Buy Page to save the changes.
Customers can select their size when purchasing the shoe rental add-on.
The variant will be revealed in the class roster and under the Add-ons tab.