REI Headwind Bike Pants
I got a pair of these for Christmas and am loving them. They are loose tights, windproof front panel, ankle zips, reflective stripe down each side. So far I've cross-county skied in them and biked in them. They've been perfect down to about 35 degrees and maybe a bit lower. There's room for tights or long underwear under them too. Now I can go skiing at a groomed xc place and look like a skier, not an old fuddy-duddy in wool army surplus pants (I do love my wool pants, though).
Oil is good, grease is better.
2007 Peter Mooney w/S&S couplers/Terry Butterfly
1993 Bridgestone MB-3/Avocet O2 Air 40W
1980 Columbus Frame with 1970 Campy parts
1954 Raleigh 3-speed/Brooks B72