Sun protection clothing I would like to see if there is clothing that can provide sun protection while
minimizing sweating and/or allow air flow.

Would also like to do the same with my bike helmet without compromising safety.

Ideas?
Many items of quality cycling clothing from reputable brands with high SPF are available. Under-helmet caps with the sun protection are available as well.

Since this site doesn't do product recommendations you'll need to browse producer and retailer sites.