I don’t think Ryan will be warm enough, John.
Give him a balaclava , wind pro top and bottom with good dwr or w/b, another layer in addition to the Cocoon Pullover or something warmer in a jacket.
You can’t always count on being able to dig a snow cave due to time or conditions, but one should be capable of digging out one, when possible—the
Snowclaw is what i was thinking of, too.
Unless he can dig a snowcave, I don’t think that the
Arc X w/ insulated clothing will be warm enough if he is forced to do the bivy/tarp combo.
17 oz./day of food in winter is probably not going to provide our guinea pig with enough calories— he’ll be peeling bark from trees,looking for bugs by the third day.
I don’t think that the G6 will provide enough volume for this particular winter load.
I think that Ryan had mentioned that the Nano-bivy would come out at around 4 oz.