Synthetic puffy vest

Patagonia's micro puff vest. It has a full zip now, mine from a few years ago has a half snap.

Integral Designs has the Logan Vest.

And, BPL will be offering to the public this Summer a Cocoon vest.

Are you looking for an insulation layer to wear while winter hiking, or something to add for rest stops/camp/sleeping? Assuming the latter, Patagonia's Micropuff is available in a pullover and zip vest. It's sturdy enough, since you're not going to be bushwhacking in it. It's also generously sized, so you can put it on over other clothing. Bozeman Mountain Works has the Cocoon in a vest as well as several other styles. Some might be available on BPL soon if they aren't all pre-sold. You might consider a sleeved jacket instead of a vest. They don't weigh that much more and they provide more warmth. My Micropuff pullover always goes with me.

Check the reader reviews under sythetic insulation clothing or read any of the numerous gear reviews on the site.

I like the Patagonia Micropuff vest, although they increased the weight on the recent model.

I just received my micro puff vest today. The vest fits well and is extreemly light. I'm sure it will serve me well. Thanks for the advise. I found it fairly cheap at Altrec.com

Dave