Synthetic winter bags

Try the North Face's Snowshoe. 3.5 pounds, zero degree rating, and it uses Climashield (though it's not Climashield XP).

Climashield or Primaloft One. In my experiences, Primaloft is the closest synthetic to down.

Eric

I posted a questiona about how durable Primaloft has been for people in sleeping bags a few weeks ago. Basically, everyone said it lost 40-50 percent of it's loft pretty quick (<1yr), but only 25-35% of it's warmth (if I remember correctly).

I'm ok with it being a short life span, the bag will see minimal use and I'm very careful with my gear. I normally have very little use for a synthetic bag as I've had no problems keeping my down dry during winter trips. Perhaps if I was in a different climate sythetics would be more appealing.

Are there any recommendations on commercial sleeping bags that feature Primaloft in a 20-30 degree version?

Integral Designs Cocoon Primaloft Bag

You may want to check out IDs range of bags. They were going to make me a Renaissance bag with 3 layers of Primaloft on top and one on bottom versus the normal 2 on 2 layers. I had to back out due to time constraints but you have enough time between now an the course to get something like that done. They charge you MSRP plus 10%.

Ive never had any problems with durability issues and Primaloft. I have been using Primaloft before it became a mainstream synthetic insulation material. My own "evidence based" approach based upon actual usage in the field and not lab studies says…Primaloft rocks…and compresses almost as good as down. Its good stuff. It dries soooooooo fast, unlike down.

Eric