Breathable, Windproof Rain Gear Recommendations
I've also been looking for summer rain gear, and I generally think that the best would be a Gore-tex product, at least one size larger than what I would normally wear, and in a two-piece version. I would add that the outfit should not be insulated, should be designed for motorcycling, and should be a light color to shed the sun's heat. (Also, I've been told that Gore-tex jackets don't work well unless they have vents in the armpits that you can zip open.)
Motoport made, a few years ago, a Gore-tex rain jacket that looked good except that it lacked underarm vents, and cost a lot.
The kind that have a thin, perforated, plastic skin and a cotton-like liner are comfortable but far too rip-prone for me, and may leak at the seams and/or front zipper.
I've seen Chinese, rain-gear manufacturers brag that their fabric is "EVA".
Questions: What kind of fabric is used for a Frog Togg? And what is EVA?
In summary, try Motoport before Aerostich on this one, and expect to make a lot of friends if your search is successful.