Hello. I’ve been using a Patagonia UL down hoody over the past year. I mostly use the jacket while inactive in camp and also to boost the warmth of my WM Summerlite. I’ve been very happy with it across a broad range of environments but there are times when I need more warmth.
The hoody has a listed weight of 9.3 oz with ~3.5 oz of down fill. In colder temps, I’m curious as to whether it makes more sense to use a true parka with ~6 oz of down, or whether it would be better to enhance the warmth of my hoody with an UL down vest (5.7 oz, 2 oz of down fill). The two garments would have a combined weight of 15 oz with 5.5 oz of fill.
I’d like to hear if/how hikers use a down vest, and whether they prefer the utility of 2 layers vs. the increased warmth of a parka.
If I go the vest route, I’m also wondering if synthetic would be more appropriate than down. I’ve read David Chenault’s excellent comparison of synthetic vs. down garments a number of times over the past year, and have basically had a similar experience of strengths and weaknesses. I’m ruling out fleece because I have found that my R2 vest just doesn’t add enough warmth to justify bringing it on a trip unless I’m using it while active (which is rare), but I’m wondering if a synthetic vest is a better option than down to boost the warmth of a down hoody.

