>> I'm TRULY not trying to be rude here, but aren't "breathable" and "windshirt" slightly oxymoronic? Perhaps you'd be better off with something like a Chocklite, which is a fairly light, rain resistant, thin soft shell...
Yes, you are absolutely right, they are often at odds with each other. This is why I posted this thread. There are a lot of wind shirts that work really well for wind protection. The same is true for rain jackets. But I am trying to find lightweight, breathable clothing for bug protection (as mentioned in the original post). For example, the original Houdini is not nearly as windproof as many of the other windshirts, but it was extremely popular because it was fairly breathable. It was a good in-between jacket; between the breathability of something like fleece and the wind resistance of something like a rain jacket. What I'm looking for is something on the extreme side of breathability, but still bug proof. I'm pretty sure every windshirt is bugproof, so that is why I am looking at those. So far, from everything I've read, both the Squamish and the Houdini are towards that end. The thing is, I don't know which one is more breathable. Likewise, I don't know if there are other jackets that are even more breathable (but less windproof).