Layering for fall in the Sierra

[FeetFirst]

After shivering my butt off trying to stargaze at night, I finally bought a down sweater, best thing ever really. If you are concerned about wet, then get a synthetic fill. Just about every company is making their version now with 800 fill. Very versatile piece of gear and weighs about half a pound.

Patagonia Down Sweater is what I own, but there are many others.

I totally agree. I currently use MontBell's UL Thermawrap (synthetic fill), which weighs about 9 ounces. It's warm enough, but doesn't ever overly impress me either. I recently scored a MontBell Alpine Light Jacket (800 FP down) for $90 and it's much, much warmer. It weights about 13 ounces and should be nice when expecting temps near and below freezing.