Where can I get feedback on new products before selling?

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We are a clothing company and I am looking for an outlet where I can post mockups of some new products we are thinking about selling. We want to get feedback before we place orders with our printers. I created a link to a hidden page on our site that has the items: https://www.staycoastalapparel.com/pages/tests so feel free to give feedback on the designs and items you see.

But are there any A/B marketing survey sites where I can ask the public? It doesn't seem to professional to do it on my social media pages.