For the latest list of required fields, please review this documentation:
SingleFeed may require more fields than you are used to, but this is because we have determined that these fields are integral to your success on the comparison shopping engines.
Please note that all the fields you submit must match our headers exactly. For example, if your file currently uses "Prod Title", you will need to change this to "Product Name" before uploading to SingleFeed. We are working on ways to make this more flexible.