What is neo-poly-bac?

There is no known substance or product called "neo-poly-bac". It's possible that:

* It's a misspelling or a made-up term.

* It's a specific product or brand name. If you have more context about where you encountered this term (e.g., a website, a product label, a scientific paper), it might be easier to identify what it refers to.

Please provide more information about the context where you saw "neo-poly-bac" so I can give you a more helpful answer.