Smiths are great for no fogging, but they are huge, don't kid yourself. There isn't anything low profile about them.
I think they look good with a helmet, decent with a boonie. Ballcap, no, unless it's backward.
I don't think a low-pro option with fan exists unless you make it yourself. My first airsoft eye pro was ESS advancer v12s, which I would consider low pro, and could be made to work with a dual fan kit and a LOT of cutting and superglue.
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