Just been thinking about my layering and reading around a bit and I can't see where softshells fit in. At present, depending on the season and weather, I'll wear a light or medium weight merino base layer, then in colder weather a Patagonia R1 or other fleece on top. Then almost always a windshirt (Houdini). The rain shell and down puffy stay in my pack for when I really need them. So where do softshells fit in? I can't see that they insulate, particularly, so I'm guessing you'd still need a baselayer at least, and it seems they're generally not as waterproof as a shell. So do they perform the same function as a windshirt? They must have certain advantages as so many retailers stock quite a range. Anyone here using one who can tell me more?