What Liza said. I, too, am a big fan of knickers. I especially like my Shebeest Shindiggers because they hit me mid-calf and are good for temps in the 50s. For lightweight tights, you might try the Sugoi Helix tight. I actually wear these even in cold weather over knickers and prefer them over thicker tights. Add arm warmers, a light, breathable jacket and full-fingered gloves and you should be good to go. Toe covers and wool socks are nice to have, too.