It's been mostly in the 40s & 50s F here lately. Pretty much perfect, but I admit, I'm still learning to dress right, for riding in it. Gore-Tex is pretty much required, as a take-along, at least, but when it's not raining hard or very cold, it gets a bit trickier. Polyester is the other "magic" material, especially for skinny folks. It's a great insulator, and very light weight, and dries quickly, if it gets wet. They have a lot of newer stuff, like Air-Loft & similar-sounding things, but it's really just a newer version of good ole polyester, I think. Jim, I'm not 100% sure, but I think there's a Mt. Washington here too. I'll have to look into that.