The Buffalo windshirt is exactly what the company Buffalo says it should be. It is all about function it's very windproof, water resistent, quick drying, it is light and it is also very breathable which one can improve enormously by using the side zipps.
no one else on the marked I know of combines the same commitment to functionallity. I bought a P6 shirt 25 years ago which I still use but that is often to warm when active so this is the best option for me when I'm active in windy conditions and I'm coming to use it also in very cold conditions when pulling a pulk which is the kind of work that makes one sweat despite the minus 20 celcius. that's when one needs to shed that moister as fast as possible. And if it really starts to rain I use a light poncho or rainjacket only till that's over.