Dashes in field names

I’ve got ACF (Advanced Custom Fields) installed and create fields with dashes in their name like “product-title”.
When i now try to output e.g.
{{ product.product-title }}
nothing gets printed out because dashes seem not to be allowed in variable names (like in php).

Is there a way to output fields with dashes in their name?
Maybe through a wrapper function?

Best regards

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