I didn't think that they actually made eyeglass cleaning cloths or cleaning solution in the US anymore. I'm so used to getting those cheap freebies from my eye doctor—bad quality soapy water in a plastic bottle that leaves a bigger streak after than before, and microfiber that's just cheaply manufactured polyester and often scratches my lenses.
I admire Koala for bucking the trend. This is a totally affordable kit at under $8 that includes a premium, ultra-dense microfiber cloth (from Japan) and a lens cleaning formula that's specifically formulated for lenses AND free of chemicals that you'll find in unregulated China products.
https://amzn.to/47XPAuj
(Note that Amazon is paying a commission for purchases through this site; as always, this did not factor into my recommendation of this product).
It has over 56,000 overwhelmingly positive reviews as of this writing, so a lot of people clearly are happier buying these than getting cheap or free ones.
The Best Products NOT Made in China | notochina.org
A community to find the best products still not made in China