Can I get some help? - I'm climbing Kili in August - I know it will get cold on summit day. My plan is various fleece layers under an arcteryx Alpha jacket. (The alpha is super light gore-tex) and with a hooded down Ama Dablan jacket to throw on top when we stop. This means i'm not doing it with a heavier parka. does anyone think i'm underestimating what i need? Should I go with a heavier outerlayer, and does anyone think i should have a jacket I can put the down layer underneath?
I've done lots of cold weather hiking but this is different in several ways. Thanks.