Hey @Matias 

Thank you so much for reaching out to the Klaviyo Community about using event variables in a plain text email!

The Klaviyo Abandoned Cart Flow for some of our integrations, like Shopify, are prebuilt with the event variables already included in the plain text. Klaviyo automatically creates a plain text version of your templates to make sure your customers always receive your marketing. You can find it by opening the Abandoned Cart Flow > Click the down arrow next to Edit and select Edit plain text version. 

Once in the plain text editor you will see code that looks like this:

This will pull the event data for each customer from their abandoned cart to included in your email.

I hope this helps get you on the right track! Thank you for being part of the Klaviyo Community!