I'm looking for an insulating layer to be worn around camp while in Glacier NP this summer. Temps could get down to the 30's at night.
I've got a Marmot Zeus jacket, but at 15 ounces, it might be overkill--plus I don't want the weight or bulk if I can help it.
So what would be a good, ultralight insulating layer that I could wear under my Marmot Essence (for wind and draft protection).
Right now, Montbell has the U.L.Down Inner Half Sleeve Jacket on sale for $87, and the Vest for $62. How do these compare to the Western Mountaineering Flash Vest? Will these be warm enough, or will I need more insulation?
I'm really interested in that Montbell Half Sleeve, but am a little skeptical of its practicality. Other suggestions?