Down or Sythetic sleeping bag?

[Mountain Wildman]

I have a 850 Down bag for cold weather and a synthetic bag for warm weather.

[hal0ofwint3r]

i have a liner and it does add warmth. tested it on a winter night without the liner in my 0deg down bag, then put the liner in and it added some significant warmth. i'd recommend getting one. i have the sea to summit thermolite reactor.

[Tinker]

What is a good liner for a down bag to add warmth? I hear it mentioned, but never get examples

Wear extra clothes in your bag instead of a liner. You can't walk around in a liner and sometimes they can be tough to get into and out of.
I have a lightweight pair of down pants and a few different down and synthetic jackets that I can mix and match for extra warmth when I need it. Long underwear will keep your bag clean as long as the underwear itself is clean. Don't forget to wear something on your head. Oily hair can dirty a bag quickly.

[Tinker]

If your friends jump off the Golden Gate Bridge, would you as well?

What??????????????????????

[woodstock64]

I picked up a Marmot 15 deg Aspen Adventure down bag. Manufactured by Marmot exclusively for Dicks Sporting Goods. Cost me $119. Weighs 2lb 8oz and packs down fairly small. With acompression sack I could probably get it down even smaller. While it is only 600FP goose down, I have found it has done the job well and is almost exactly comparable to Marmot"s other 600FP bags at half the price. Plus Marmot stands behind this bag 100%. Just my 2 cents.

[rip waverly]

down all around